Dual fluorescence and intramolecular charge transfer with crystalline 4-(diisopropylamino)benzonitrile

被引：35

作者：

Druzhinin, SI ^{[1
]}

Demeter, A ^{[1
]}

Zachariasse, KA ^{[1
]}

机构：

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

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 347卷 / 4-6期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/S0009-2614(01)01079-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：

Dual fluorescence from a locally excited (LE) and an intramolecular charge transfer (ICT) state is observed with 4-(diisopropylamino)benzonitrile (DIABN) crystals, from 80 down to -110 degreesC. With crystalline 4-(methylamino)benzonitrile (MABN) only LE emission is observed over this temperature range. Crystals of 4-(dimethylamino)benzonitrile (DMABN) at room temperature mainly show LE fluorescence, whereas the red-shifted structured phosphorescence increases in importance upon cooling. Its spectral shape resembles that of DMABN phosphorescence in low-temperature glassy media, red-shifted by around 2800 cm(-1). The ICT fluorescence of DIABN crystals at -110 degreesC has a risetime of 55 ps, which becomes shorter with increasing temperature. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：421 / 428

页数：8

共 22 条

[1] EXCIMER FLUORESCENCE .12. PYRENE CRYSTAL EXCIMER INTERACTION POTENTIAL [J].

BIRKS, JB ;

KAZZAZ, AA .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1968, 304 (1478) :291-&

[2]

Bu''nau G. v., 1970, RANG DALESPHARMACOLO, V74, P1294, DOI [10.1002/bbpc.19700741223, DOI 10.1002/BBPC.19700741223]

[3] Fluorescence excitation spectra of jet-cooled 4-(diisopropylamino)benzonitrile and related compounds [J].

Daum, R ;

Druzhinin, S ;

Ernst, D ;

Rupp, L ;

Schroeder, J ;

Zachariasse, KA .

CHEMICAL PHYSICS LETTERS, 2001, 341 (3-4) :272-278

[4] Ultrafast x-ray diffraction tracks molecular shape-shifting [J].

Day, C .

PHYSICS TODAY, 2001, 54 (03) :19-20

[5] Dual fluorescence and fast intramolecular charge transfer with 4-(diisopropylamino) benzonitrile in alkane solvents [J].

Demeter, A ;

Druzhinin, S ;

George, M ;

Haselbach, E ;

Roulin, JL ;

Zachariasse, KA .

CHEMICAL PHYSICS LETTERS, 2000, 323 (3-4) :351-360

[6] STRUCTURE AND CRYSTAL PACKING OF 4-AMINOBENZONITRILES AND 4-AMINO-3,5-DIMETHYLBENZONITIRLES AT VARIOUS TEMPERATURES [J].

HEINE, A ;

HERBSTIRMER, R ;

STALKE, D ;

KUHNLE, W ;

ZACHARIASSE, KA .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1994, 50 :363-373

[7] Intramolecular charge transfer in dual fluorescent 4-(dialkylamino)benzonitriles.: Reaction efficiency enhancement by increasing the size of the amino and benzonitrile subunits by alkyl substituents [J].

Il'ichev, YV ;

Kühnle, W ;

Zachariasse, KA .

JOURNAL OF PHYSICAL CHEMISTRY A, 1998, 102 (28) :5670-5680

[8] DIMETHYLAMINOBENZONITRILE - STRUCTURE OF THE LOWER-TEMPERATURE SOLID-PHASE - COMPARISON WITH THE STRUCTURE OF THE HIGHER-TEMPERATURE PHASE AND CORRELATION WITH OPTICAL SPECTROSCOPIC PROPERTIES [J].

JAMESON, GB ;

SHEIKHALI, BM ;

WEISS, RG .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1994, 50 :703-707

[9]

LIPPERT E, 1959, ADV MOL SPECTROSC, P443

[10] THE EXTERNAL HEAVY-ATOM EFFECT - PHOTOPHYSICS OF (DIMETHYLAMINO)BENZONITRILE IN CRYOGENIC RARE-GAS MATRICES [J].

MORGAN, MA ;

PIMENTEL, GC .

JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (08) :3056-3062

← 1 2 3 →