scholarly journals Near UV-Visible electronic absorption originating from charged amino acids in a monomeric protein

2017 ◽  
Vol 8 (8) ◽  
pp. 5416-5433 ◽  
Author(s):  
Saumya Prasad ◽  
Imon Mandal ◽  
Shubham Singh ◽  
Ashim Paul ◽  
Bhubaneswar Mandal ◽  
...  
Keyword(s):  
Amino Acids ◽  
Charge Transfer ◽  
Electronic Absorption ◽  
Protein Backbone ◽  
Protein Absorption ◽  
Charged Amino Acids ◽  
Charge Transfer Transitions ◽  
Uv Visible

We report 250–800 nm UV-Vis monomeric protein absorption originating from protein backbone–sidechain and sidechain–sidechain charge transfer transitions involving Lys/Glu residues.

Optical backbone-sidechain charge transfer transitions in proteins sensitive to secondary structure and modifications

2018 ◽  
Vol 207 ◽  
pp. 115-135 ◽  
Author(s):  
I. Mandal ◽  
S. Paul ◽  
R. Venkatramani
Keyword(s):  
Amino Acids ◽  
Charge Transfer ◽  
Secondary Structure ◽  
Protein Backbone ◽  
Charged Amino Acids ◽  
Charge Transfer Transitions

We report the UV-vis absorption originating from protein backbone-sidechain charge transfer transitions in charged amino acids with anionic and cationic sidechains.

scholarly journals Photoluminescence of Pentavalent Uranyl Amide Complexes

2021 ◽  
Author(s):  
Fabrizio Ortu ◽  
simon Randall ◽  
David J. Moulding ◽  
Adam woodward ◽  
Karsten Meyer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Excited State ◽  
Charge Transfer ◽  
Synthesis And Characterization ◽  
New Family ◽  
Theoretical Investigations ◽  
Charge Transfer Transitions ◽  
Uv Visible ◽  
First Time

We report the synthesis and characterization of a new family of pentavalent uranyl amide complexes, supported also by photoluminescence and theoretical investigations. These studies reveal for the first time that the UV-visible emission of uranyl(V) is an admixture of charge transfer transitions accompanied by vibronic coupling of the quartet excited state with uranyl oxo and amide vibrations, thereby offering new insights into the electronic structure of the reactive uranyl(V)

scholarly journals Photoluminescence of Pentavalent Uranyl Amide Complexes

2021 ◽  
Author(s):  
Fabrizio Ortu ◽  
simon Randall ◽  
David J. Moulding ◽  
Adam woodward ◽  
Karsten Meyer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Excited State ◽  
Charge Transfer ◽  
Synthesis And Characterization ◽  
New Family ◽  
Theoretical Investigations ◽  
Charge Transfer Transitions ◽  
Uv Visible ◽  
First Time

We report the synthesis and characterization of a new family of pentavalent uranyl amide complexes, supported also by photoluminescence and theoretical investigations. These studies reveal for the first time that the UV-visible emission of uranyl(V) is an admixture of charge transfer transitions accompanied by vibronic coupling of the quartet excited state with uranyl oxo and amide vibrations, thereby offering new insights into the electronic structure of the reactive uranyl(V)

scholarly journals Electron Transfer Pathways and Dynamics in Drosophila Cryptochrome - the Role of Protein Electrostatics

2019 ◽  
Vol 205 ◽  
pp. 10009 ◽  
Author(s):  
Martin Richter ◽  
Benjamin P. Fingerhut
Keyword(s):  
Amino Acids ◽  
Electron Transfer ◽  
Charge Transfer ◽  
Charge Separation ◽  
Quantum Dynamics ◽  
Protein Electrostatics ◽  
Charged Amino Acids ◽  
Electron Transfer Pathways ◽  
Dynamics Simulations

Dissipative quantum dynamics simulations reveal a branching of charge separation dynamics in Drosophila Cryptochrome due to subtle balanced energetics within the enzyme. In silico mutations of charged amino acids provide control over charge transfer directionality.

Elektronenspektren der Fluoro-Chloro-Osmate(V), [OsFnCl6–n]–, n = 0 — 6

1986 ◽  
Vol 41 (10) ◽  
pp. 1222-1227 ◽  
Author(s):  
Th. Groth ◽  
W. Preetz
Keyword(s):  
Fine Structure ◽  
Charge Transfer ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Absorption Bands ◽  
Charge Transfer Transitions ◽  
Temperature Spectra ◽  
Tetraethylammonium Salts

The electronic absorption spectra of the solid tetraethylammonium salts of [OsFnCl6-n]- are measured at 10 K. The strong bands in the UV/YIS region are assigned to charge transfer transitions from π(t1 u, t2 u) and σ(t1 u ) Cl orbitals into the π(t2g3) Os(V) level. The weak intraconfigurational excitations within the t2g3 manifold of Os(V) are split by spin-orbit coupling and lowered symmetry into Kramers doublets, observed in the range 5500-18000 cm-1. The 0 - 0-transitions are deduced from vibrational fine structure; for the centrosymmetric complexes they are confirmed by hot bands recorded in the normal temperature spectra. There is a systematical shift of all absorption bands to higher energy with increasing number of F-ligands.

Spectroscopic Studies on Some Benzenethiols

1972 ◽  
Vol 26 (2) ◽  
pp. 270-277 ◽  
Author(s):  
R. H. Abu-Eittah ◽  
R. H. Hilal
Keyword(s):  
Charge Transfer ◽  
Oscillator Strength ◽  
Electronic Absorption ◽  
Intramolecular Charge Transfer ◽  
Electronic Absorption Spectra ◽  
Transition Probability ◽  
Spectroscopic Studies ◽  
Different Types ◽  
Charge Transfer Transitions ◽  
Derivatives Of

The electronic absorption spectra of some derivatives of benzenethiol were studied in the visible-ultraviolet regions in a number of solvents. Solvent effects on the position of band maxima helped in identifying the different types of transitions obtained, namely n → π*, π → π*, and intramolecular charge transfer transitions. Energies of the charge transfer bands were computed theoretically and agreed well with the experimental results. Transition probability coefficients and oscillator strength were calculated for the different transitions. Numerical values of the oscillator strength helped to differentiate between the various types of transitions.

scholarly journals Photoluminescence of Pentavalent Uranyl Amide Complexes

2021 ◽  
Author(s):  
Fabrizio Ortu ◽  
simon Randall ◽  
David J. Moulding ◽  
Adam woodward ◽  
Karsten Meyer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Excited State ◽  
Charge Transfer ◽  
Synthesis And Characterization ◽  
New Family ◽  
Theoretical Investigations ◽  
Charge Transfer Transitions ◽  
Uv Visible ◽  
First Time

We report the synthesis and characterization of a new family of pentavalent uranyl amide complexes, supported also by photoluminescence and theoretical investigations. These studies reveal for the first time that the UV-visible emission of uranyl(V) is an admixture of charge transfer transitions accompanied by vibronic coupling of the quartet excited state with uranyl oxo and amide vibrations, thereby offering new insights into the electronic structure of the reactive uranyl(V)

Synthesis and characteristics of ethylenediamine-N,N'-di-S-α-isovalerate and isomers of its cobalt(III) complexes

1982 ◽  
Vol 47 (1) ◽  
pp. 210-216 ◽  
Author(s):  
Milan Strašák ◽  
František Bachratý ◽  
Jaroslav Majer
Keyword(s):  
Amino Acids ◽  
Absolute Configuration ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Chemical Parameters ◽  
Methyl Group ◽  
Nmr Data ◽  
Physico Chemical ◽  
Natural Amino Acids ◽  
C Nmr

The synthesis and physico-chemical parameters are described of a new complexone based on natural amino acids, viz. ethylenediamine-N,N'-di-S-α-isovalerate (SS-EDDIV). 1H- and 13C-NMR data revealed that the methyl group in the substance are not equivalent. The isomers of the cobalt(III) complex with the asymmetric tetradentate SS-EDDIV ligand were prepared and separated; their characteristics are given. The absolute configuration of two of the five theoretically feasible isomers was determined based on their electronic absorption spectra and circular dichroism data.

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