Interplay of conformational relaxation and hydrogen bond dynamics in the excited states of fluorescent Schiff base anions
Literature Information
Souradip Dasgupta, Arkaprava Chowdhury, Dipak Kumar Sahoo, Anindya Datta
Time resolved fluorescence spectroscopic investigation of four Schiff base anions has established that their excited state dynamics is governed by several solvent properties: polarity, viscosity and hydrogen bond donating ability. With viscous protic solvents like glycerol, fluorescence lifetimes of anions have been found to be markedly longer than those in ethanol, implying that conformational relaxation of molecules plays a key role in their nonradiative relaxation. Surprisingly, the lifetimes in less viscous aprotic solvents, like acetonitrile, are found to be even longer. The only plausible rationalization of this observation is in the light of hydrogen bond-assisted nonradiative phenomena that are operative in protic solvents. This contention draws support from a time evolution of the emission in the red end of the spectrum in low to moderately hydrogen bond donating protic solvents, with regard to an absence of such a rise time in aprotic solvents and strongly hydrogen bond donating solvents, viz., 2,2,2-trifluoroethanol. Rudimentary quantum chemical calculations provide a preliminary idea about the nature of excited state hydrogen bond redistribution involved in the process.
Related Literature
Revealing stable geometries and magic clusters of hexagonal boron nitride in the nucleation of chemical vapor deposition growth on Ni(111)/Cu(111) surfaces: a theoretical study
Hongxia Zhu, Xiaolei Zhao, Huanhuan Li
DOI: 10.1039/C9CP06425G
Enhanced structural disorder at a nanocrystalline ice surface
Yuji Otsuki, Kazuya Watanabe, Yoshiyasu Matsumoto
DOI: 10.1039/C8CP07269H
An Au22(L8)6 nanocluster with in situ uncoordinated Au as a highly active catalyst for O2 activation and CO oxidation
Fuhua Li, Qing Tang
DOI: 10.1039/C9CP03469B
Synthesis of nanosized vanadium(v) oxide clusters below 10 nm
Maximilian Lasserus, Daniel Knez, Florian Lackner, Martin Schnedlitz, Roman Messner, Daniel Schennach, Gerald Kothleitner, Ferdinand Hofer, Andreas W. Hauser, Wolfgang E. Ernst
DOI: 10.1039/C9CP04357H
How flexible is the disulfide linker? A combined rotational–computational investigation of diallyl disulfide
Jean Demaison, Rizalina Tama Saragi, Marcos Juanes, Heinz Dieter Rudolph, Alberto Lesarri
DOI: 10.1039/C9CP02508A
Switching between Hückel and Möbius aromaticity: a density functional theory and information-theoretic approach study
Chunying Rong, Tian Lu, Paul Geerlings, Frank De Proft, Mercedes Alonso, Shubin Liu
DOI: 10.1039/C9CP06120G
Why does the presence of silicon atoms improve the emission properties of biphenyl derivatives? – Verification of various hypotheses by experiment and theory
Karolina Rachuta, Jacek Koput, Gordon L. Hug, Mariusz Majchrzak
DOI: 10.1039/C9CP03749G
Noble gas insertion compounds of hydrogenated and lithiated hyperhalogens
Xiao-Ting Chang, Ying Li, Jia-Yuan Liu, Hai-Di Ma, Di Wu
DOI: 10.1039/C9CP01284B
Gas phase dynamics, conformational transitions and spectroscopy of charged saccharides: the oxocarbenium ion, protonated anhydrogalactose and protonated methyl galactopyranoside
M. P. Dvores, P. Çarçabal, P. Maître, J. P. Simons
DOI: 10.1039/C9CP06572E
You might also like
What precautions should be taken when handling 2-Methyl-2-propanyl 5-amino-2-thiophenecarboxylate (CAS: 1498311-57-1)?
When handling 2-Methyl-2-propanyl 5-amino-2-thiophenecarboxylate (CAS: 1498311-5...
What are the physical and chemical properties of 5-Bromo-1,2-dichloro-3-fluorobenzene (CAS: 1000572-93-9)?
5-Bromo-1,2-dichloro-3-fluorobenzene (CAS: 1000572-93-9) is a crystalline solid ...
How should (2R)-2-Amino-2-(4-bromophenyl)ethanol (CAS: 354153-64-3) be stored?
(2R)-2-Amino-2-(4-bromophenyl)ethanol (CAS: 354153-64-3) should be stored in a c...
What regulatory guidelines apply to Methyl 4-(aminomethyl)tetrahydro-2H-pyran-4-carboxylate hydrochloride (CAS: 362707-24-2)?
Methyl 4-(aminomethyl)tetrahydro-2H-pyran-4-carboxylate hydrochloride (CAS: 3627...
What are the main uses of 1,4-dimethyl-1H-pyrazole-5-sulfonyl chloride (CAS: 1174834-52-6)?
1,4-Dimethyl-1H-pyrazole-5-sulfonyl chloride is primarily used as an intermediat...
Is Dinaphtho[1,2-b:2',1'-d]furan (CAS: 239-69-0) safe?
Dinaphtho[1,2-b:2',1'-d]furan is generally safe when handled with appropriate pe...
What is the market or research trend for 7-Methyl-7,9-dihydro-1H-purine-2,6,8(3H)-trione (CAS: 612-37-3)?
The market for 7-Methyl-7,9-dihydro-1H-purine-2,6,8(3H)-trione (CAS: 612-37-3) i...
What are the physical and chemical properties of 2-(4-Chlorophenyl)malonaldehyde (CAS: 205676-17-1)?
2-(4-Chlorophenyl)malonaldehyde (CAS: 205676-17-1) is a colorless or light yello...
How is 2-Methylchrysene (CAS: 3351-32-4) typically synthesized?
2-Methylchrysene (CAS: 3351-32-4) is typically synthesized via the reaction of c...
Is N-(6-aminopyrimidin-4-yl)acetamide (CAS: 89533-23-3) safe?
N-(6-aminopyrimidin-4-yl)acetamide (CAS: 89533-23-3) is generally considered saf...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










![1-{[5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-thienyl]methyl}piperidine structure 1-{[5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-thienyl]methyl}piperidine structure](https://static.chemtradehub.com/structs/121/1218790-44-3-baef.webp)
![3-(benzotriazol-1-yl)-N-[[2-[(3-bromophenyl)methoxy]phenyl]methylideneamino]propanamide structure 3-(benzotriazol-1-yl)-N-[[2-[(3-bromophenyl)methoxy]phenyl]methylideneamino]propanamide structure](https://static.chemtradehub.com/structs/559/5595-78-8-0a32.webp)
![N-[(1-Ethyl-2-pyrrolidinyl)methyl]-2-hydroxy-5-sulfamoylbenzamide structure N-[(1-Ethyl-2-pyrrolidinyl)methyl]-2-hydroxy-5-sulfamoylbenzamide structure](https://static.chemtradehub.com/structs/673/67381-52-6-877f.webp)

![1-Oxa-8-azaspiro[4.5]decan-3-ol structure 1-Oxa-8-azaspiro[4.5]decan-3-ol structure](https://static.chemtradehub.com/structs/757/757239-76-2-a0ec.webp)