List of works by Ralf Ludwig

A Stable Manganese Pincer Catalyst for the Selective Dehydrogenation of Methanol.

scientific article published on 2 December 2016

A molecularly defined iron-catalyst for the selective hydrogenation of α,β-unsaturated aldehydes

scientific article published on 6 May 2013

A simple geometrical explanation for the occurrence of specific large aggregated ions in some protic ionic liquids

scientific article published in November 2009

A simple guiding principle for the temperature dependence of the solubility of light gases in imidazolium-based ionic liquids derived from molecular simulations.

scientific article published on 25 November 2016

Advancing into water's "no man's land": two liquid states?

scientific article published on 22 September 2014

An elemental mercury diffusion coefficient for natural waters determined by molecular dynamics simulation

scientific article published in May 2009

An operando FTIR spectroscopic and kinetic study of carbon monoxide pressure influence on rhodium-catalyzed olefin hydroformylation

scientific article published on 31 July 2014

Anticancer evaluation of a manganese complex on HeLa and MCF-7 cancer cells: design, deterministic solvothermal synthesis approach, Hirshfeld analysis, DNA binding, intracellular reactive oxygen species production, electrochemical characterization a

scientific article published on 06 March 2020

Applying the inductive effect for synthesizing low-melting and low-viscosity imidazolium-based ionic liquids

scientific article published on 01 February 2009

Aromaticity of azines through dyotropic double hydrogen transfer reaction

scientific article published on 07 June 2014

Balance Between Contact and Solvent-Separated Ion Pairs in Mixtures of the Protic Ionic Liquid [Et<sub>3</sub>NH][MeSO<sub>3</sub>] with Water Controlled by Water Content and Temperature

scientific article published in 2021

Base-free hydrogen generation from methanol using a bi-catalytic system

scientific article published on 28 November 2013

Base-free non-noble-metal-catalyzed hydrogen generation from formic acid: scope and mechanistic insights

scientific article

Calculation of clathrate-like water clusters including H2O-buckminsterfullerene

scientific article published on 01 January 2005

Cation-cation clusters in ionic liquids: Cooperative hydrogen bonding overcomes like-charge repulsion

scientific article published on 2 December 2015

Cationic clustering influences the phase behaviour of ionic liquids

scientific article published in Scientific Reports

Cavity model challenged: the hydrated electron is localized in regions of enhanced water density

scientific article published on 24 November 2010

Chain Length Dependence of Hydrogen Bond Linkages between Cationic Constituents in Hydroxy-Functionalized Ionic Liquids: Tracking Bulk Behavior to the Molecular Level with Cold Cluster Ion Spectroscopy

scientific article published on 14 January 2020

Characterization of Doubly Ionic Hydrogen Bonds in Protic Ionic Liquids by NMR Deuteron Quadrupole Coupling Constants: Differences to H-bonds in Amides, Peptides, and Proteins.

scientific article published on 17 September 2017

Climate change, water and security in the Mediterranean: Introduction to the special issue.

scientific article published on 25 November 2015

Clusters of Hydroxyl-Functionalized Cations Stabilized by Cooperative Hydrogen Bonds: The Role of Polarizability and Alkyl Chain Length

scientific article published on 27 October 2020

Collective contributions to the dielectric relaxation of hydrogen-bonded liquids

scientific article

Combined THz, FIR and Raman spectroscopy studies of imidazolium-based ionic liquids covering the frequency range 2-300 cm(-1)

scientific article published on 01 February 2010

Comment on "Isotope effects in liquid water by infrared spectroscopy. IV. No free OH groups in liquid water" [J. Chem. Phys. 133, 164509 (2010)]

scientific article published on 01 September 2011

Comment on "New interpretation of the CH stretching vibrations in imidazolium-based ionic liquids"

scientific article published on 01 January 2010

Comparison of force fields on the basis of various model approaches--how to design the best model for the [CnMIM][NTf2] family of ionic liquids

scientific article

Complex formation of isocytosine tautomers with PdII and PtII.

scientific article

Controlling "like-likes-like" charge attraction in hydroxy-functionalized ionic liquids by polarizability of the cations, interaction strength of the anions and varying alkyl chain length

scientific article published on 17 January 2020

Controlling the kinetic and thermodynamic stability of cationic clusters by the addition of molecules or counterions

scientific article published on 27 June 2017

Controlling the subtle energy balance in protic ionic liquids: dispersion forces compete with hydrogen bonds

scientific article published on 13 January 2015

Cooperatively enhanced hydrogen bonds in ionic liquids: closing the loop with molecular mimics of hydroxy-functionalized cations

scientific article published on 01 August 2019

Copper-Based Photosensitisers in Water Reduction: A More Efficient In Situ Formed System and Improved Mechanistic Understanding

scientific article published on 22 December 2015

Counting cations involved in cationic clusters of hydroxy-functionalized ionic liquids by means of infrared and solid-state NMR spectroscopy

scientific article published on 01 April 2020

Crystal structure of (difluoro)methoxyoxo iodine(V) IF2(O)OCH3

scientific article published on 01 October 2000

Crystal structure of IO(2)F

scientific article published on 01 December 2001

Cyclic octamer of hydroxyl-functionalized cations with net charge Q=+8e kinetically stabilized by a 'molecular island' of cooperative hydrogen bonds

scientific article published on 26 August 2020

Deuteron quadrupole coupling constants and reorientational correlation times in protic ionic liquids

scientific article published on 12 April 2016

Diferrate [Fe2(CO)6(μ-CO)(μ-P(aryl)2)]- as Self Assembling Iron/Phosphor Based Catalyst for Hydrogen Evolution in Photocatalytic Proton Reduction - Spectroscopic Insights

scientific article published on 19 October 2018

Dispersion and Hydrogen Bonding Rule: Why the Vaporization Enthalpies of Aprotic Ionic Liquids Are Significantly Larger than those of Protic Ionic liquids

scientific article published on 09 August 2016

Dissecting anion-cation interaction energies in protic ionic liquids

scientific article published on 16 January 2013

Dissecting intermolecular interactions in the condensed phase of ibuprofen and related compounds: the specific role and quantification of hydrogen bonding and dispersion forces

scientific article published on 01 March 2020

Dissecting the Vaporization Enthalpies of Ionic Liquids by Exclusively Experimental Methods: Coulomb Interaction, Hydrogen Bonding, and Dispersion Forces

scientific article published on 24 May 2019

Do We Understand the Volatility of Ionic Liquids?

scientific article published on 01 January 2007

Dynamical heterogeneities in ionic liquids as revealed from deuteron NMR.

scientific article published on 21 February 2018

Dynamics of methanol in ionic liquids: validity of the Stokes-Einstein and Stokes-Einstein-Debye relations

scientific article published on 23 July 2014

Editorial of the PCCP themed issue on “Basic Mechanisms in Energy Conversion”

scientific article published on 01 April 2016

Editorial: Ionic Liquids: The Fundamentals and Forces Driving Their Rise

scientific article published on 01 May 2012

Efficient Dehydrogenation of Formic Acid Using an Iron Catalyst

scientific article published in Science

Equilibrium of contact and solvent-separated ion pairs in mixtures of protic ionic liquids and molecular solvents controlled by polarity

scientific article published on 2 October 2013

Estimating enthalpies of vaporization of imidazolium-based ionic liquids from far-infrared measurements

scientific article published on 01 June 2010

Exploring between the extremes: conversion-dependent kinetics of phosphite-modified hydroformylation catalysis.

scientific article published on 11 June 2012

Facile Synthesis of a stable side-on Phosphinyne Complex by Redox Driven Intramolecular Cyclisation

scientific article published on 17 March 2020

Formation of "quasi" contact or solvent-separated ion pairs in the local environment of probe molecules dissolved in ionic liquids

scientific article published on 08 January 2014

Formation of the magic cluster Na8 in noble gas matrixes

scientific article published in December 2002

Formation of water clusters in a hydrophobic solvent

scientific article published on 01 October 2003

Freezing the Motion in Hydroxy-Functionalized Ionic Liquids-Temperature Dependent NMR Deuteron Quadrupole Coupling Constants for Two Types of Hydrogen Bonds Far below the Glass Transition

scientific article published on 14 July 2020

Hexamers: from covalently bound organic structures to hydrogen bonded water clusters

scientific article published on 01 August 2000

Highly active and selective photochemical reduction of CO2 to CO using molecular-defined cyclopentadienone iron complexes.

scientific article

How does water bind to metal surfaces: hydrogen atoms up or hydrogen atoms down?

scientific article published on 01 August 2003

Hydrogen Bonding Between Ions of Like Charge in Ionic Liquids Characterized by NMR Deuteron Quadrupole Coupling Constants-Comparison with Salt Bridges and Molecular Systems

scientific article published on 31 October 2019

Hydrogen Bonds between Ions of Opposite and Like Charge in Hydroxyl-Functionalized Ionic Liquids: an Exhaustive Examination of the Interplay between Global and Local Motions and Intermolecular Hydrogen Bond Lifetimes and Kinetics

scientific article published in 2021

Hydrogen bonding in a mixture of protic ionic liquids: a molecular dynamics simulation study

scientific article published on 29 January 2015

Hydrogen bonding in protic ionic liquids: reminiscent of water

scientific article published in January 2009

Hydroxy-substituted oligosilane dendrimers: controlling the electronic properties through hydrogen bonding

scientific article published on 01 October 2006

IR and NMR properties of ionic liquids: do they tell us the same thing?

scientific article published on 01 October 2007

Imidazolium salt ion pairs in solution.

scientific article published on April 2015

In Situ FTIR and NMR Spectroscopic Investigations on Ruthenium-Based Catalysts for Alkene Hydroformylation

scientific article published on 19 January 2016

In Spite of the Chemist's Belief: Carbonic Acid Is Surprisingly Stable

scientific article published on 01 April 2000

Influence of Hydrogen Bonding between Ions of Like Charge on the Ionic Liquid Interfacial Structure at a Mica Surface

scientific article published on 18 November 2019

Insights into the mechanism of photocatalytic water reduction by DFT-supported in situ EPR/Raman spectroscopy

scientific article published on 10 August 2011

Integration of research advances in modelling and monitoring in support of WFD river basin management planning in the context of climate change

scientific article

Interdisciplinary assessment of sea-level rise and climate change impacts on the lower Nile delta, Egypt

scientific article

Ion pairing in protic ionic liquids probed by far-infrared spectroscopy: effects of solvent polarity and temperature

scientific article published on 12 June 2014

Ion speciation of protic ionic liquids in water: transition from contact to solvent-separated ion pairs

scientific article published on 10 February 2013

Ion-pair formation in the ionic liquid 1-ethyl-3-methylimidazolium bis(triflyl)imide as a function of temperature and concentration

scientific article published on 01 September 2006

Ionic liquids can be more hydrophobic than chloroform or benzene

scientific article published on 27 June 2012

Ionic liquids--revolutionary potential for chemistry?

scientific article published on 01 July 2006

Ionic liquids: dissecting the enthalpies of vaporization

scientific article published on 01 March 2008

Iron-catalyzed hydrogen production from formic acid

scientific article

Isolating the role of hydrogen bonding in hydroxyl-functionalized ionic liquids by means of vaporization enthalpies, infrared spectroscopy and molecular dynamics simulations

scientific article published on 01 September 2019

Isolation, characterization and DFT studies of epoxy ring containing new withanolides from Withania coagulans Dunal

scientific article published on 19 March 2019

Isolation, spectroscopic and density functional theory studies of 7-(4-methoxyphenyl)-9H-furo[2,3-f]chromen-9-one: a new flavonoid from the bark of Millettia ovalifolia

scientific article published on 09 March 2015

Isotopic quantum effects in liquid methanol

scientific article published on 01 July 2005

Kinetics and mechanism of antibacterial activity and cytotoxicity of Ag-RGO nanocomposite.

scientific article published on 4 August 2017

Kinetics of Hydrogen Bonding between Ions with Opposite and Like Charges in Hydroxyl-Functionalized Ionic Liquids

scientific article published on 23 December 2020

Large Stokes Shift Ionic-Liquid Dye.

scientific article published on 29 May 2017

Like-likes-Like: Cooperative Hydrogen Bonding Overcomes Coulomb Repulsion in Cationic Clusters with Net Charges up to Q=+6e

scientific article published on 26 April 2018

Limiting diffusion coefficients of ionic liquids in water and methanol: a combined experimental and molecular dynamics study

scientific article published on 13 January 2011

Low-frequency vibrational modes of protic molten salts and ionic liquids: detecting and quantifying hydrogen bonds

scientific article published on 04 May 2012

Mechanistic Study on the Addition of CO2 to Epoxides Catalyzed by Ammonium and Phosphonium Salts: A Combined Spectroscopic and Kinetic Approach

article

Metal/Metal Redox Isomerism Governed by Configuration

scientific article published on 10 July 2020

Microheterogeneities in ionic-liquid-methanol solutions studied by FTIR spectroscopy, DFT calculations and molecular dynamics simulations

scientific article published on 29 February 2012

Molecular Composition of Liquid Sulfur

article

Molecular dynamic simulations of ionic liquids: a reliable description of structure, thermodynamics and dynamics

scientific article

New insight into the transport mechanism of hydrated hydroxide ions in water

scientific article published on 01 January 2003

Non-ideal mixing behaviour of hydrogen bonding in mixtures of protic ionic liquids

scientific article published on 20 November 2014

Novel acridine-based thiosemicarbazones as 'turn-on' chemosensors for selective recognition of fluoride anion: a spectroscopic and theoretical study

scientific article published on 04 July 2018

Obstacles to data access for research related to climate and water: Implications for science and EU policy-making

On the validity of Stokes-Einstein and Stokes-Einstein-Debye relations in ionic liquids and ionic-liquid mixtures.

scientific article published in September 2008

Photo-tunable linear and nonlinear optical response of cyclophanediene-dihydropyrene photoswitches

scientific article published on 04 February 2019

Photocatalytic hydrogen generation from water with iron carbonyl phosphine complexes: improved water reduction catalysts and mechanistic insights.

scientific article

Predicting the Ionic Product of Water

scientific article published on 31 August 2017

Preparation and crystal structure of tetraphenylphosphonium triiodotetrabromide [PPh4][I3Br4]

scientific article published on 01 January 2001

Preparation and properties of dimethyltetrafluorophosphate

scientific article published in July 2010

Pressure and salt effects in simulated water: two sides of the same coin?

scientific article published on 01 January 2007

Probing molecular interaction in ionic liquids by low frequency spectroscopy: Coulomb energy, hydrogen bonding and dispersion forces

scientific article published on 01 October 2014

Protonated water clusters: the third dimension

scientific article published on 01 October 2004

Quantum cluster equilibrium theory of liquids: Freezing of QCE/3-21G water to tetrakaidecahedral “Bucky-ice”

scientific article published in January 1999

Raman Spectroscopic Investigation of Matrix Isolated Rubidium and Cesium Molecules: Rb(2), Rb(3), Cs(2), and Cs(3)(,)(1)

scientific article published on 01 October 1999

Revisiting imidazolium based ionic liquids: Effect of the conformation bias of the [NTf] anion studied by molecular dynamics simulations

article

Rotational and translational dynamics and their relation to hydrogen bond lifetimes in an ionic liquid by means of NMR relaxation time experiments and molecular dynamics simulation

article

Salt effects on the structure of water probed by attenuated total reflection infrared spectroscopy and molecular dynamics simulations

scientific article published on 01 December 2008

Selective Catalytic Hydrogenations of Nitriles, Ketones, and Aldehydes by Well-Defined Manganese Pincer Complexes

scientific article published on 24 May 2016

Small Potassium Clusters

scientific article published on 01 June 1998

Small magnesium clusters: between van der waals and valence bonds

scientific article published in April 2010

Solvent dependent asymmetric hydrogenation with self-assembled catalysts: a combined catalytic, NMR- and IR-study

scientific article published on 26 January 2009

Solvophobic solvation and interaction of small apolar particles in imidazolium-based ionic liquids

scientific article published on 20 March 2008

Specific ion effects on water structure and dynamics beyond the first hydration shell

scientific article published on 01 January 2011

Spectroscopic Evidence for Clusters of Like-Charged Ions in Ionic Liquids Stabilized by Cooperative Hydrogen Bonding

scientific article

Spectroscopic and density functional theory studies of 7-hydroxy-3'-methoxyisoflavone: A new isoflavone from the seeds of Indigofera heterantha (Wall).

scientific article published on 13 April 2015

Spectroscopic evidence for an attractive cation-cation interaction in hydroxyl-functionalized ionic liquids: The first H-bonded chain-like trimer

article

Spectroscopic evidence for an enhanced anion-cation interaction from hydrogen bonding in pure imidazolium ionic liquids

scientific article published in January 2010

Spectroscopic evidence of ‘jumping and pecking’ of cholinium and H-bond enhanced cation–cation interaction in ionic liquids

article

Strong, localized, and directional hydrogen bonds fluidize ionic liquids

scientific article published on 01 January 2008

Structural Motifs in Cold Ternary Ion Complexes of Hydroxyl-Functionalized Ionic Liquids: Isolating the Role of Cation-Cation Interactions

scientific article published on 21 May 2018

Structure and dynamics of water confined in dimethyl sulfoxide.

scientific article

Structure-property relationships in ionic liquids: a study of the anion dependence in vaporization enthalpies of imidazolium-based ionic liquids

scientific article published on 01 February 2012

Synthesis and characterization of tetramethylammonium trifluorosulfate

scientific article published on 16 November 2010

Tandem-yeast expression system for engineering and producing unspecific peroxygenase.

scientific article published on 23 March 2015

Temperature and concentration effects on the solvophobic solvation of methane in aqueous salt solutions

scientific article published in December 2008

Temperature dependence of the solubility of carbon dioxide in imidazolium-based ionic liquids

scientific article published in September 2009

The Double-Faced Nature of Hydrogen Bonding in Hydroxy-Functionalized Ionic Liquids Shown by Neutron Diffraction and Molecular Dynamics Simulations

scientific article published on 09 July 2019

The Effect of Additives on the Viscosity and Dissolution of Cellulose in Tetrabutylphosphonium Hydroxide

scientific article published on 26 June 2019

The Relation between Vaporization Enthalpies and Viscosities: Eyring's Theory Applied to Selected Ionic Liquids.

scientific article

The anion dependence of the interaction strength between ions in imidazolium-based ionic liquids probed by far-infrared spectroscopy

scientific article published on 31 July 2012

The association of water in ionic liquids: a reliable measure of polarity

scientific article published on 01 May 2006

The cation-anion interaction in ionic liquids probed by far-infrared spectroscopy

scientific article published on 01 January 2008

The complex nature of water at molecular interfaces

scientific article published on 01 December 2008

The dissolution of polyols in salt solutions and ionic liquids at molecular level: ions, counter ions, and hofmeister effects.

scientific article published on 10 July 2013

The effect of dispersion forces on the interaction energies and far infrared spectra of protic ionic liquids

scientific article published on 10 April 2015

The effect of neutral ion aggregate formation on the electrical conductivity of an ionic liquid and its mixtures with chloroform

scientific article published on 12 March 2012

The importance of hydrogen bonds for the structure of ionic liquids: single-crystal X-ray diffraction and transmission and attenuated total reflection spectroscopy in the terahertz region

scientific article published on 01 December 2010

The importance of tetrahedrally coordinated molecules for the explanation of liquid water properties

scientific article published on 01 April 2007

The influence of hydrogen bonding on the physical properties of ionic liquids

scientific article published on 13 June 2011

The influence of hydrogen-bond defects on the properties of ionic liquids

scientific article published on 31 May 2011

The influence of like-charge attraction on the structure and dynamics of ionic liquids: NMR chemical shifts, quadrupole coupling constants, rotational correlation times and failure of Stokes-Einstein-Debye.

scientific article published on 7 February 2018

The mechanism of the molecular reorientation in water

scientific article published on 01 January 2007

The potential role of hydrogen bonding in aprotic and protic ionic liquids

scientific article published on 29 July 2009

The puzzling properties of supercooled and glassy water

scientific article published on 01 May 2006

The structure of liquid methanol

scientific article published on 01 July 2005

Thermodynamic properties of ionic liquids-a cluster approach

scientific article published on 05 June 2008

Towards an inter-disciplinary research agenda on climate change, water and security in Southern Europe and neighboring countries

scholarly article by Ralf Ludwig et al published November 2011 in Environmental Science and Policy

Towards thermally stable cyclophanediene-dihydropyrene photoswitches.

scientific article published on 20 May 2015

Trifluoromethyl Hypobromite, CF(3)OBr

scientific article published on 01 May 1997

Twisted oxygen-containing oligosilanes--unprecedented examples of sigma-n mixed conjugated systems

scientific article published on 15 February 2007

Understanding the Nature of Nuclear Magnetic Resonance Relaxation by Means of Fast-Field-Cycling Relaxometry and Molecular Dynamics Simulations-The Validity of Relaxation Models

scientific article published on 04 March 2020

Understanding the dissolution of polyols by ionic liquids using the example of a well-defined model compound

scientific article published on 13 July 2011

Utilization of the dye N-methyl-6-oxyquinolone as an optical acidometer in molecular solvents and protic ionic liquids.

scientific article published on 11 September 2017

Vibrational dephasing in ionic liquids as a signature of hydrogen bonding.

scientific article published on 15 July 2015

Volatile times for the very first ionic liquid: understanding the vapor pressures and enthalpies of vaporization of ethylammonium nitrate

scientific article published on 30 July 2014

Water: From Clusters to the Bulk

scientific article

Water: From Clusters to the Bulk

What far-infrared spectra can contribute to the development of force fields for ionic liquids used in molecular dynamics simulations

scientific article published on 01 June 2009

When Like Charged Ions Attract in Ionic Liquids: Controlling the Formation of Cationic Clusters by the Interaction Strength of the Counterions

scientific article published on 19 December 2016

When hydrogen bonding overcomes Coulomb repulsion: from kinetic to thermodynamic stability of cationic dimers

scientific article published on 01 April 2019

ortho-Metalation of iron(0) tribenzylphosphine complexes: homogeneous catalysts for the generation of hydrogen from formic acid

scientific article published on November 2010

tert-Butylphosphonic acid: from the bulk to the gas phase

scientific article published in February 2003

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