Comment on "Pseudo-Jahn-Teller and TICT-models:: a photophysical comparison of meta-and para-DMABN derivatives" [Chem. Phys. Lett. 305(1999)8] -: The PICT model for dual fluorescence of aminobenzonitriles

被引：202

作者：

Zachariasse, KA ^{[1
]}

机构：

[1] Max Planck Inst Biophys Chem Spektroskopie & Phot, D-37070 Gottingen, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 320卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(00)00230-X

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：

Due to the larger admixture of charge transfer (CT) in the intramolecular charge transfer (ICT) state than in the locally excited (LE) state of dual fluorescent molecules such as 4-(dimethylamino)benzonitrile, the radiative rate constant k'(f)(ICT) is smaller than k(f)(LE), irrespective of the ICT molecular structure. The validity of the TICT or PICT model can therefore not be tested with these data. The absence of dual fluorescence for 4-(methylamino)benzonitrile, 3-(dimethylamino)benzonitrile and two dicyano-N,N-dimethylanilines, which cannot be explained by the TICT hypothesis, is caused by their large energy gap Delta E(S-1,S-2), which prevents the ICT state from becoming lower in energy than LE. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：8 / 13

页数：6

共 29 条

[11]

Lippert E., 1962, ADV MOL SPECTROSC, P443, DOI DOI 10.1021/ac010370l

[12]

Murrell J. N, 1963, THEORY ELECT SPECTRA

[13] INTRAMOLECULAR CHARGE-TRANSFER ABSORPTION AND EMISSION RESULTING FROM THROUGH-BOND INTERACTION IN BICHROMOPHORIC MOLECULES [J].

PASMAN, P ;

ROB, F ;

VERHOEVEN, JW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1982, 104 (19) :5127-5133

[14] CLASSIFICATION OF SPECTRA OF CATA-CONDENSED HYDROCARBONS [J].

PLATT, JR .

JOURNAL OF CHEMICAL PHYSICS, 1949, 17 (05) :484-495

[15] CHARGE SEPARATION IN EXCITED-STATES OF DECOUPLED SYSTEMS - TICT COMPOUNDS AND IMPLICATIONS REGARDING THE DEVELOPMENT OF NEW LASER-DYES AND THE PRIMARY PROCESSES OF VISION AND PHOTOSYNTHESIS [J].

RETTIG, W .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1986, 25 (11) :971-988

[16] Pseudo-Jahn-Teller and TICT-models:: a photophysical comparison of meta- and para-DMABN derivatives [J].

Rettig, W ;

Bliss, B ;

Dirnberger, K .

CHEMICAL PHYSICS LETTERS, 1999, 305 (1-2) :8-14

[17] REINTERPRETATION OF ANOMALOUS FLUORESCENCE OF "PARA-N,N-DIMETHYLAMINO-BENZONITRILE [J].

ROTKIEWICZ, K ;

GRELLMANN, KH ;

GRABOWSKI, ZR .

CHEMICAL PHYSICS LETTERS, 1973, 19 (03) :315-318

[18]

Salem L., 1966, MOL ORBITAL THEORY C

[19] Low-lying excited states of 4-dimethylaminobenzonitrile: Equilibrium geometries, vibrational frequencies and charge transfer character [J].

Scholes, GD ;

Phillips, D ;

Gould, IR .

CHEMICAL PHYSICS LETTERS, 1997, 266 (5-6) :521-526

[20] EXCITED-STATE DIPOLE-MOMENTS OF DUAL FLUORESCENT 4-(DIALKYLAMINO)BENZONITRILES - INFLUENCE OF ALKYL CHAIN-LENGTH AND EFFECTIVE SOLVENT POLARITY [J].

SCHUDDEBOOM, W ;

JONKER, SA ;

WARMAN, JM ;

LEINHOS, U ;

KUHNLE, W ;

ZACHARIASSE, KA .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (26) :10809-10819

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