Chemosensing in deep red: A squaraine-based fluorescent chemosensor for pH.

被引：30

作者：

Isgor, YG ^{[1
]}

Akkaya, EU ^{[1
]}

机构：

[1] MIDDLE E TECH UNIV,DEPT CHEM,TR-06531 ANKARA,TURKEY

来源：

TETRAHEDRON LETTERS | 1997年 / 38卷 / 42期

关键词：

D O I：

10.1016/S0040-4039(97)01745-0

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

We have synthesized and spectrally characterized a squaraine-based fluorescent chemosensor for pH. This chemosensor unlike many others, works in 100 % aqueous solutions, signalling the pH change from 10 to 7 by a 11-fold increase in the emission intensity at 651 nm, when excited at the isosbestic point (614 nm). The average pK(a) for the ionizable groups is found to be 8.8. The chemosensor with its molar extinction coefficient > 200,000 and the quantum yield of 0.2, yield an impressive intrinsic brightness value of 40,000. (C) 1997 Elsevier Science Ltd.

引用

收藏

页码：7417 / 7420

页数：4

相关论文

共 26 条

[1] A squaraine-based near IR fluorescent chemosensor for calcium. [J].

Akkaya, EU ;

Turkyilmaz, S .

TETRAHEDRON LETTERS, 1997, 38 (25) :4513-4516

[2]

[Anonymous], TOPICS FLUORESCENCE

[3] STRONG 2ND-HARMONIC GENERATION FROM CENTROSYMMETRIC DYES [J].

ASHWELL, GJ ;

JEFFERIES, G ;

HAMILTON, DG ;

LYNCH, DE ;

ROBERTS, MPS ;

BAHRA, GS ;

BROWN, CR .

NATURE, 1995, 375 (6530) :385-388

[4]

BISSELL RA, 1993, TOP CURR CHEM, V168, P223

[5] LUMINESCENCE AND CHARGE-TRANSFER .2. AMINOMETHYL ANTHRACENE-DERIVATIVES AS FLUORESCENT PET (PHOTOINDUCED ELECTRON-TRANSFER) SENSORS FOR PROTONS [J].

BISSELL, RA ;

CALLE, E ;

DE SILVA, AP ;

DESILVA, SA ;

GUNARATNE, HQN ;

HABIBJIWAN, JL ;

PEIRIS, SLA ;

RUPASINGHE, RADD ;

SAMARASINGHE, TKSD ;

SANDANAYAKE, KRAS ;

SOUMILLION, JP .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1992, (09) :1559-1564

[6]

Czarnik A. W., 1992, ACS SYM SER, V538, P235

[7] PHOTOCHEMISTRY OF SQUARAINE DYES .8. PHOTOPHYSICAL PROPERTIES OF CROWN-ETHER SQUARAINE FLUOROIONOPHORES AND THEIR METAL-ION COMPLEXES [J].

DAS, S ;

THOMAS, KG ;

THOMAS, KJ ;

KAMAT, PV ;

GEORGE, MV .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (37) :9291-9296

[8] Proton-controlled switching of luminescence in lanthanide complexes in aqueous solution: pH sensors based on long-lived emission [J].

de Silva, AP ;

Gunaratne, HQN ;

Rice, TE .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1996, 35 (18) :2116-2118

[9]

DESVERGNE JP, 1997, P NATO ASI SERIES C, V492

[10] LUMINESCENT PH SENSORS BASED ON DI(2,2'-BIPYRIDYL) (5,5'-DIAMINOMETHYL-2,2'-BIPYRIDYL)RUTHENIUM(II) COMPLEXES [J].

GRIGG, R ;

NORBERT, WDJA .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1992, (18) :1300-1302