The role of free volume in the twisted intramolecular charge transfer (TICT) emission of dimethylaminobenzonitrile and related compounds in rigid polymer matrices

KA Al-Hassan, T Azumi - Chemical physics letters, 1988 - Elsevier
The amount of free volume present in a polymer matrix represents a driving force toward
twisted intramolecular charge transfer (TICT) emission of p-dimethylaminobenzonitrile …

Multichromophoric cyclodextrins. 2. Inhomogeneous spectral broadening and directed energy hop**

MN Berberan-Santos, J Pouget, B Valeur… - The Journal of …, 1993 - ACS Publications
A j9-cyclodextrin bearing seven 2-naphthoyloxy chromophores is a good model for thestudy
of the effect of the excitation wavelength on energy hop** among chromophoresin well …

Red edge effect (REE) phenomena of flexible solute molecules as a probe for polymer rigidity and/or free volume

KA Al-hassan, T Azumi - Chemical physics letters, 1988 - Elsevier
The fluorescence spectra of the tert-butyl ester of 9-anthroic acid (9TBA) in two PVA (poly
(vinyl alcohol)) polymer matrices of different molecular weights are different and indicate …

The red edge effect as a tool for investigating the origin of the anomalous fluorescence band of 9, 9′-bianthryl in rigid polar polymer matrices

KA Al-Hassan, T Azumi - Chemical physics letters, 1988 - Elsevier
The excitation wavelength dependence of the fluorescence of 9, 9′-bianthryl (BA) in polar
polymer matrices at room temperature is attributed to the presence of different conformers …

Solvent polarity indicators: Flexible styrylpyridinium and quinolinium fluorescence probes for medium free-volume

MS Antonious - Spectrochimica Acta Part A: Molecular and …, 1997 - Elsevier
Fluorescence properties are studied for four structurally related flexible styrylpyridinium and
quinolinium dyes of electron donor-acceptor type in glycerol at different temperatures. The …

Fluorescence decay characteristics of 4-dimethylaminobenzonitrile in different polymer matrices: A time-resolved study in the nanosecond range

KA Al-Hassan, T Azumi - Chemical physics letters, 1989 - Elsevier
The fluorescence decay curves of 4-dimethylaminobenzonitrile (DMABN) in different polar
protic and aprotic polymer matrices are nonexponential. The lifetimes of the twisted …

TICT fluorescence emission dependence on excitation wavelength for ethyl p-(dimethylamino) benzoate in supercritical trifluoromethane

BJ Hrnjez, PT Yazdi, MA Fox… - Journal of the American …, 1989 - ACS Publications
(6) Kajimoto, O.; Futakami, M.; Kobayashi, T.; Yamasaki, KJ Phys. Chem. 1988, 92, 1347.
Kajimoto demonstrated that thefluorescence and absorbance behavior of p-(dimethylamino) …

Effect of polymer binding on the spectroscopic properties of stilbene‐based fluorescent dyes

KJ Smit, KP Ghiggino - Journal of Polymer Science Part B …, 1991 - Wiley Online Library
Studies utilizing absorption and emission spectrophotometry have been carried out to
observe the effect of various polymer substrates on the spectral characteristics of several …

Edge‐excitation red shift of the fluorescence of flexible solute molecules in a poly (methyl methacrylate) polymer matrix

KA Al‐Hassan - Journal of Polymer Science Part B: Polymer …, 1988 - Wiley Online Library
An excitation wavelength dependence of the fluorescence of tert‐butyl and methyl esters of
9‐anthroic acid and of tetraphenylbutadiene and tetraphenylmethylbutadiene in a poly …

Time‐resolved fluorescence study of 4‐dimethylaminobenzonitrile in nonhydrogen‐bonding polymers, using picosecond dye laser pulses as excitation source

KA Al‐Hassan - Journal of Polymer Science Part B: Polymer …, 1995 - Wiley Online Library
It is shown that the time‐resolved fluorescence (TRF) spectra and the red edge effect (REE)
phenomena are useful tools to observe the twisted intramolecular charge transfer (TICT) …