TY - JOUR
T1 - Ring opening process of some spirochromenes by photoproduced HCl in poly(N-vinyl carbazole)
AU - Sarač, A. Sezai
AU - Sezer, Esma
AU - Ustamehmetoǧlu, Belkis
AU - Mannschreck, Albrecht
AU - Stephan, Barbara
PY - 1997/9
Y1 - 1997/9
N2 - The coloration reaction of some spirochromenes (SP) has been investigated in the case of a free radical photosensitive system composed of a poly(N-vinylcarbazole) matrix (PVCz) in dichloromethane containing carbon tetrachloride as an activator at average ratios of 5:1:0.1 for PVCz, CCl4 and SP, respectively. In this system, photoproduced HCl leads to the formation of the colored forms of SP. Acidification and irradiation of the variety of spirochromene solutions in the presence and absence of PVCz were also investigated and compared with the effect of photoproduced HCl on the reversibility of the ring opening process. The opened forms of the compounds were characterized by UV-visible spectra, pH and conductivity measurements. The effect of solvent and the substituent of SP were investigated. Decoloration reactions of the opened forms of SP at 50°C were followed using UV-visible spectroscopy, pH and conductivity measurements.
AB - The coloration reaction of some spirochromenes (SP) has been investigated in the case of a free radical photosensitive system composed of a poly(N-vinylcarbazole) matrix (PVCz) in dichloromethane containing carbon tetrachloride as an activator at average ratios of 5:1:0.1 for PVCz, CCl4 and SP, respectively. In this system, photoproduced HCl leads to the formation of the colored forms of SP. Acidification and irradiation of the variety of spirochromene solutions in the presence and absence of PVCz were also investigated and compared with the effect of photoproduced HCl on the reversibility of the ring opening process. The opened forms of the compounds were characterized by UV-visible spectra, pH and conductivity measurements. The effect of solvent and the substituent of SP were investigated. Decoloration reactions of the opened forms of SP at 50°C were followed using UV-visible spectroscopy, pH and conductivity measurements.
KW - Photosensitive systems
KW - Poly(N-vinylcarbazole)
KW - Ring opening process
KW - Spirochramenes
KW - Thermal bleaching
UR - http://www.scopus.com/inward/record.url?scp=0031238080&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1099-1581(199709)8:9<563::AID-PAT687>3.0.CO;2-Q
DO - 10.1002/(SICI)1099-1581(199709)8:9<563::AID-PAT687>3.0.CO;2-Q
M3 - Article
AN - SCOPUS:0031238080
SN - 1042-7147
VL - 8
SP - 563
EP - 567
JO - Polymers for Advanced Technologies
JF - Polymers for Advanced Technologies
IS - 9
ER -