scholarly journals Strong Exciton–Vibrational Coupling in Molecular Assemblies. Dynamics Using the Polaron Transformation in HEOM Space

2021 ◽  
Author(s):  
Joachim Seibt ◽  
Oliver Kühn
Keyword(s):  
Molecular Assemblies ◽  
Vibrational Coupling

Infrared spectra and substituent effects in 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones

1983 ◽  
Vol 48 (2) ◽  
pp. 586-595 ◽  
Author(s):  
Alexander Perjéssy ◽  
Pavol Hrnčiar ◽  
Ján Šraga
Keyword(s):  
Substituent Effects ◽  
Phenyl Group ◽  
Wave Number ◽  
Vibrational Coupling ◽  
Wave Numbers ◽  
Stretching Vibration ◽  
Stretching Vibrations ◽  
The Relationship ◽  
Derivatives Of ◽  
Effect Of Structure

The wave numbers of the fundamental C=O and C=C stretching vibrations, as well as that of the first overtone of C=O stretching vibration of 2-(3-, and 4-substituted phenylmethylene)-1,3-cycloheptanediones and 1,3-cycloheptanedione were measured in tetrachloromethane and chloroform. The spectral data were correlated with σ+ constants of substituents attached to phenyl group and with wave number shifts of the C=O stretching vibration of substituted acetophenones. The slope of the linear dependence ν vs ν+ of the C=C stretching vibration of the ethylenic group was found to be more than two times higher than that of the analogous correlation of the C=O stretching vibration. Positive values of anharmonicity for asymmetric C=O stretching vibration can be considered as an evidence of the vibrational coupling in a cyclic 1,3-dicarbonyl system similarly, as with derivatives of 1,3-indanedione. The relationship between the wave numbers of the symmetric and asymmetric C=O stretching vibrations indicates that the effect of structure upon both vibrations is symmetric. The vibrational coupling in 1,3-cycloheptanediones and the application of Seth-Paul-Van-Duyse equation is discussed in relation to analogous results obtained for other cyclic 1,3-dicarbonyl compounds.

scholarly journals A Soft On/Off Switch Based on the Electrochemically Reversible H-J Interconversion of a Floating Porphyrin Membrane

2021 ◽  
Author(s):  
Andrés F. Molina-Osorio ◽  
Sho Yamamoto ◽  
Iván Robayo-Molina ◽  
Alonso Gamero-Quijano ◽  
Hirohisa Nagatani ◽  
...  
Keyword(s):  
Molecular Assemblies ◽  
External Stimuli

Soft molecular assemblies that respond reversibly to external stimuli are attractive materials as on/off switches, in optoelectronic, memory and sensor technologies. In this Edge Article, we present the reversible structural...

scholarly journals An octanol hinge opens the door to water transport

2021 ◽  
Author(s):  
Zhu Liu ◽  
Aurora E. Clark
Keyword(s):  
Water Transport ◽  
Phase Boundaries ◽  
Molecular Assemblies

Despite their pharmacological relevance, the mechanism of transport across water/octanol phase boundaries has remained unexplored. Octanol molecular assemblies are demonstrated to reversibly bind water and swing like the hinge of a door.

A chiral–racemic lyotropic chromonic liquid crystal system

Soft Matter ◽  
2021 ◽  
Author(s):  
Jordan K. Ando ◽  
Peter J. Collings
Keyword(s):  
Liquid Crystal ◽  
Optical Microscopy ◽  
Orientational Order ◽  
Molecular Assemblies ◽  
Polarized Optical Microscopy ◽  
Crystal System ◽  
System P ◽  
Liquid Crystal System

A lyotropic chromonic liquid crystal consists of oriented molecular assemblies in solution. If the molecules are chiral, the helical pattern of orientational order is revealed by the stripes seen with polarized optical microscopy.

Heterionic vibrational coupling in crystalline methylammonium nitrate

1992 ◽  
Vol 88 (12) ◽  
pp. 1631 ◽  
Author(s):  
Upali A. Jayasooriya ◽  
Sidney F. A. Kettle ◽  
Richard Mortimer ◽  
Juergen Eckert ◽  
Nancy K. McGuire
Keyword(s):  
Vibrational Coupling

A Dipeptide-Based Multicolored-Switching Luminescent Solid Material: When Molecular Assemblies Meet Mechanochemical Reaction

2012 ◽  
Vol 124 (26) ◽  
pp. 6504-6507 ◽  
Author(s):  
Ming-Jun Teng ◽  
Xin-Ru Jia ◽  
Xiao-Fang Chen ◽  
Yen Wei
Keyword(s):  
Solid Material ◽  
Mechanochemical Reaction ◽  
Molecular Assemblies
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