Flash photolysis study of 2,4,6-trimethylpyrylium and 2,4,6-triphenylpyrylium ions: Evidence for oxoniabenzvalene intermediate

被引：0
|
作者：
Sivakumar, A [1 ]
Parimala, S [1 ]
Ramamurthy, P [1 ]
机构：
[1] UNIV MADRAS,SCH CHEM,DEPT INORGAN CHEM,MADRAS 600025,TAMIL NADU,INDIA
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1996年 / 94卷 / 2-3期
关键词：
photochemistry; flash photolysis; photolysis; pyrylium ions; oxoniabenzvalene;
D O I：
10.1016/1010-6030(95)04217-2
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：
A flash photolysis study of 2,4,6-trimethylpyrylium perchlorate (TMP) and 2,4,6-triphenylpyrylium tetrafluoroborate (TPP) was performed in hydroxylic medium. The transient absorptions observed for TMP and TPP in methanol with maxima at 365 and 390 nm respectively are due to the formation of the intermediate oxoniabenzvalene. We also report the triplet-triplet absorption spectrum of TMP in methanol.
引用
收藏
页码：129 / 133
页数：5
相关论文
共 50 条
  • [41] Electrocatalysis of neurotransmitter catecholamines by 2,4,6-triphenylpyrylium ion immobilized inside zeolite Y supercages
    Doménech, A
    Doménech-Carbo, MT
    García, H
    Galletero, MS
    CHEMICAL COMMUNICATIONS, 1999, (21) : 2173 - 2174
  • [42] 2,4,6-TRIPHENYLPYRYLIUM PERCHLORATE AS ION-ASSOCIATION REAGENT - SPECTROPHOTOMETRIC DETERMINATION OF TL(III)
    SANCHEZPEDRENO, C
    RUIZ, TP
    CORDOBA, MH
    LOZANO, CM
    BUENDIA, PM
    ANALES DE QUIMICA SERIE B-QUIMICA INORGANICA Y QUIMICA ANALYTICA, 1982, 78 (01): : 60 - 63
  • [43] 2,4,6-triphenylpyrylium ion encapsulated within Y zeolite as photocatalyst for the degradation of methyl parathion
    Sanjuán, A
    Aguirre, G
    Alvaro, M
    García, H
    WATER RESEARCH, 2000, 34 (01) : 320 - 326
  • [44] FLASH-PHOTOLYSIS OF 2,4,6-TRINITROTOLUENE SOLUTIONS
    SURYANARAYANAN, K
    CAPELLOS, C
    INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 1974, 6 (01) : 89 - 102
  • [45] Influence of microencapsulation on the stability and reactivity of 2,4,6-triphenylpyrylium tetrakis(pentafluorophenyl)gallate as a cationic photoinitiator
    Komarova, EY
    Ren, KT
    Neckers, DC
    LANGMUIR, 2002, 18 (11) : 4195 - 4197
  • [46] Oxidative degradation of 2,4-xylidine by photo sensitization with 2,4,6-triphenylpyrylium:: homogeneous and heterogeneous catalysis
    Amat, AM
    Arques, A
    Bossmann, SH
    Braun, AM
    Göb, S
    Miranda, MA
    Oliveros, E
    CHEMOSPHERE, 2004, 57 (09) : 1123 - 1130
  • [47] SYNTHESIS OF 2,6-DIMETHYL-4-STYRYLPYRYLIUM SALTS (FROM 2,4,6-TRIMETHYLPYRYLIUM AND DONOR-SUBSTITUTED BENZALDEHYDES) AND THEIR CONVERSION INTO PYRIDINES
    ONICIU, DC
    MARTON, A
    BALABAN, TS
    VLAD, S
    BALABAN, AT
    REVUE ROUMAINE DE CHIMIE, 1990, 35 (04) : 561 - 565
  • [48] 2,4,6-Triphenylpyrylium tetrafluoroborate-photosensitized reactions of o-cinnamylphenols and o-hydroxystilbenes
    Delgado, J
    Espinos, A
    Jimenez, MC
    Miranda, MA
    Tormos, R
    TETRAHEDRON, 1997, 53 (02) : 681 - 688
  • [49] PROTON NUCLEAR MAGNETIC-RESONANCE STUDY OF THE ADDITION OF METHOXIDE ION TO 2,4,6-TRIPHENYLPYRYLIUM, 2,4,6-TRIPHENYLTHIOPYRYLIUM, 1,2,4,6-TETRAPHENYLPYRIDINIUM, AND 1-(P-NITROPHENYL)-2,4,6-TRIPHENYLPYRIDINIUM CATIONS
    AVETA, R
    DODDI, G
    INSAM, N
    STEGEL, F
    JOURNAL OF ORGANIC CHEMISTRY, 1980, 45 (25): : 5160 - 5163
  • [50] Product studies and laser flash photolysis of direct and 2,4,6-triphenylpyrylium-zeolite Y photocatalyzed degradation of fenvalerate
    Sanjuan, Ana
    Aguirre, Guillermo
    Alvaro, Mercedes
    Garcia, Hermenegildo
    Scaiano, J. C.
    Chretien, Michelle N.
    Focsaneanu, Kathy-Sarah
    PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2002, 1 (12) : 955 - 959
12345