Excited-State Intramolecular Proton Transfer in Polymers

1995 ◽  
Vol 413 ◽  
Author(s):  
Richard M. Tarkka ◽  
Samson A. Jenekhe
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Main Chain ◽  
Intramolecular Proton Transfer ◽  
Polymer Structure ◽  
Laser Dyes ◽  
Excimer Formation ◽  
Photochromic Materials ◽  
Hydrogen Bonded

ABSTRACTExcited state intramolecular proton transfer (ESIPT) has been demonstrated in new intramoleculary hydrogen bonded (IHB) polymers of interest as photostabilizers, triplet quenchers, photochromic materials, laser dyes and electroluminescent materials. The new IHB polymers containing the 2-(2-hydroxyphenyl)benzoxazole moiety in the main chain were used to explore the effects of polymer structure, extended conjugation and competition with excimer formation on the ESIPT process. It was found that polymer structure, and particularly extent of conjugation, affects an IHB polymer's ability to exhibit ESIPT.

scholarly journals Natural Born Laser Dyes: Excited-State Intramolecular Proton Transfer (ESIPT) Emitters and Their Use in Random Lasing Studies

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1093 ◽  
Author(s):  
Julien Massue ◽  
Thibault Pariat ◽  
Pauline M. Vérité ◽  
Denis Jacquemin ◽  
Martyna Durko ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Photophysical Properties ◽  
Intramolecular Proton Transfer ◽  
Stimulated Emission ◽  
Laser Dyes ◽  
Random Lasing ◽  
Level Laser ◽  
Laser Systems ◽  
Optical Behavior

A series of five excited-state intramolecular proton transfer (ESIPT) emitters based on a 2-(2′-hydroxyphenyl) benzoxazole (HBO) scaffold, functionalized with a mono-or bis-(trialkylsilyl) acetylene extended spacer are presented. Investigation of their photophysical properties in solution and in the solid-state in different matrix, along with ab initio calculations gave useful insights into their optical behavior. Random lasing studies were conducted on a series of PMMA doped thin films, showing the presence of stimulated emission above the threshold of pumping energy density (ρth ≈ 0.5–2.6 mJ cm−2). In this work, the similarity of four level laser systems is discussed in light of the ESIPT photocycle.

scholarly journals An enhanced sampling QM/AMOEBA approach: The case of the excited state intramolecular proton transfer in solvated 3-hydroxyflavone

2021 ◽  
Vol 154 (18) ◽  
pp. 184107
Author(s):  
Michele Nottoli ◽  
Mattia Bondanza ◽  
Filippo Lipparini ◽  
Benedetta Mennucci
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Enhanced Sampling

scholarly journals The development of aryl-substituted 2-phenylimidazo[1,2-a]pyridines (PIP) with various colors of excited-state intramolecular proton transfer (ESIPT) luminescence in the solid state

2016 ◽  
Vol 4 (16) ◽  
pp. 3599-3606 ◽  
Author(s):  
Toshiki Mutai ◽  
Tatsuya Ohkawa ◽  
Hideaki Shono ◽  
Koji Araki
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Aryl Group ◽  
Red Emission ◽  
Wide Range

The color of ESIPT luminescence of HPIP is tuned in a wide range by the introduction of aryl group(s), and thus a series of PIPs showing blue to red emission is realized.

ChemInform Abstract: EXCITED-STATE INTRAMOLECULAR PROTON TRANSFER AND VIBRATIONAL RELAXATION IN 2-(2-HYDROXYPHENYL)BENZOTHIAZOLE

1983 ◽  
Vol 14 (28) ◽  
Author(s):  
K. DING ◽  
S. J. COURTNEY ◽  
A. J. G. STRANDJORD ◽  
S. FLOM ◽  
D. M. FRIEDRICH ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Vibrational Relaxation ◽  
Intramolecular Proton Transfer

Reaction-based sensing of fluoride ions using desilylation method for triggering excited-state intramolecular proton transfer

2016 ◽  
Vol 28 (7-8) ◽  
pp. 693-706 ◽  
Author(s):  
Ajit Kumar Mahapatra ◽  
Sanchita Mondal ◽  
Saikat Kumar Manna ◽  
Kalipada Maiti ◽  
Rajkishor Maji ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Fluoride Ions
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