SPECTROSCOPIC OBSERVATION OF CONTACT ION-PAIRS FORMED FROM PHOTOLYZED TMPD AND TMB IN THE PRESENCE OF HALOGENATED COMPOUNDS IN NONPOLAR-SOLVENTS

被引:6
作者
SHIMAMORI, H
MUSASA, H
机构
[1] Fukui Institute of Technology, Fukui 910
关键词
D O I
10.1021/j100039a024
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Flash photolysis at 308 nm has been employed to detect contact ion pairs (CIP) formed from excited N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) and N,N,N',N'-tetramethylbenzidine (TMB) in CCl4 solvent and in benzene solutions containing halogenated compounds AX (CCl4 C2H5I, C2H5Br, C6H5I, C6H5Br, and C6H5-Cl). Transient absorption spectra in CCl4 solvent indicate the formation of CIPs for both TMPD and TMB. While the transient spectra for benzene solutions without AX show the formation of only the excited tripler state of TMPD or TMB, those with AX indicate the formation of the corresponding CIP with different mechanism between TMPD and TMB, from the excited tripler state for TMPD, and from direct excitation of weakly-bound heteromer for TMB. The rates and efficiencies for the CIP formation depend on the AX molecule. The present results support the mechanism of CIP formation suggested previously in the microwave dielectric absorption studies.
引用
收藏
页码:14359 / 14364
页数:6
相关论文
共 14 条
[1]   LASER PHOTOIONIZATION AND LIGHT-INITIATED REDOX REACTIONS OF TETRAMETHYLBENZIDINE IN ORGANIC-SOLVENTS AND AQUEOUS MICELLAR SOLUTION [J].
ALKAITIS, SA ;
GRATZEL, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1976, 98 (12) :3549-3554
[2]  
DAS PK, 1984, J ORG CHEM, V49, P1977, DOI 10.1021/jo00185a029
[3]   TIME-RESOLVED RESONANCE RAMAN STUDIES OF TRANSIENT SPECIES IN THE PHOTOIONIZATION OF N,N,N',N'-TETRAMETHYL-P-PHENYLENEDIAMINE IN SOLUTION [J].
ISAKA, H ;
SUZUKI, S ;
OHZEKI, T ;
SAKAINO, Y ;
TAKAHASHI, H .
JOURNAL OF PHOTOCHEMISTRY, 1987, 38 :167-175
[5]   THE PHOTOIONIZATION MECHANISM OF N,N,N',N'-TETRAMETHYL-RHO-PHENYLENEDIAMINE IN ACETONITRILE [J].
NAKAMURA, S ;
KANAMARU, N ;
NOHARA, S ;
NAKAMURA, H ;
SAITO, Y ;
TANAKA, J ;
SUMITANI, M ;
NAKASHIMA, N ;
YOSHIHARA, K .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1984, 57 (01) :145-150
[6]   CONTACT ION-PAIRS FORMED FROM PHOTOLYZED TMPD-CCL4 AND TMPD-CCL4-C6H6 SOLUTIONS STUDIED BY THE TIME-RESOLVED MICROWAVE DIELECTRIC ABSORPTION TECHNIQUE [J].
SHIMAMORI, H ;
UEGAITO, H .
JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (16) :6218-6227
[7]   CONTACT ION-PAIRS FORMED FROM PHOTOLYZED SOLUTIONS OF N,N,N',N'-TETRAMETHYLBENZIDINE IN CCL4 [J].
SHIMAMORI, H ;
TATSUMI, Y .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (37) :9408-9412
[8]   RATES AND EFFICIENCIES OF CONTACT-ION-PAIR FORMATION IN PHOTOLYZED MIXTURES OF TMPD WITH HALOGENATED COMPOUNDS IN NONPOLAR-SOLVENTS [J].
SHIMAMORI, H ;
HANAMURO, K ;
TATSUMI, Y .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (14) :3545-3550
[9]  
SHIMAMORI H, 1993, J PHYS CHEM-US, V98, P2576
[10]   PHOTO-IONIZATION OF N,N,N',N'-TETRAMETHYL-P-PHENYLENEDIAMINE IN ORGANIC MATRICES [J].
TSUBOMURA, H ;
YAMAMOTO, N ;
KIMURA, K ;
SATO, T ;
YAMADA, H ;
KATO, M ;
YAMAGUCH.G ;
NAKATO, Y .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1965, 38 (11) :2021-+