Solvent Dependant Optical Switching in Carbazole-Based Fluorescent Nanoparticles

被引：42

作者：

Adhikari, Ravi M. ^{[2
]}

Shah, Bipin K. ^{[1
]}

Palayangoda, Sujeewa S. ^{[2
]}

Neckers, Douglas C. ^{[2
]}

机构：

[1] Pittsburg State Univ, Dept Chem, Pittsburg, KS 66762 USA

[2] Bowling Green State Univ, Ctr Photochem Sci, Bowling Green, OH 43403 USA

来源：

LANGMUIR | 2009年 / 25卷 / 04期

关键词：

NANOCRYSTALS; EMISSION;

D O I：

10.1021/la802716w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Suitably susbtituted ethynylphenyl carbazoles (PBM and PPM) form stable fluorescent organic nanoparticles. The emission of the nanoparticles can be reversibly switched on/off in the blue-green and orange-red regions by a change in the ratio of the tetrahydrofuran/water system used in their preparation. The size of the nanoparticles was found to be dependent on the solvent ratio, and the emissions were significantly red-shifted compared to those of dilute solutions of PBM and PPM in tetrahydrofuran. This is attributed to the formation of intermolecular charge transfer complexes in the nanoparticle state. The application of the nanoparticles as a chemical vapor sensor has been suggested.

引用

页码：2402 / 2406

页数：5

共 24 条

[1] Synthesis and photophysical properties of carbazole-based blue light-emitting dendrimers [J].

Adhikari, Ravi M. ;

Mondal, Rajib ;

Shah, Bipin K. ;

Neckers, Douglas C. .

JOURNAL OF ORGANIC CHEMISTRY, 2007, 72 (13) :4727-4732

[2] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[3] Enhanced emission and its switching in fluorescent organic nanoparticles [J].

An, BK ;

Kwon, SK ;

Jung, SD ;

Park, SY .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (48) :14410-14415

[4]

Benzamin G., 2004, SCIENCE, V305, P651

[5] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[6]

*CTR PHOT SCI, 671 CTR PHOT SCI

[7] Synthesis and characterization of polymer-coated quantum dots with integrated acceptor dyes as FRET-based nanoprobes [J].

Fernandez-Argueelles, Maria Teresa ;

Yakovlev, Aleksey ;

Sperling, Ralph A. ;

Luccardini, Camilla ;

Gaillard, Stephane ;

Medel, Alfredo Sanz ;

Mallet, Jean-Maurice ;

Brochon, Jean-Claude ;

Feltz, Anne ;

Oheim, Martin ;

Parak, Wolfgang J. .

NANO LETTERS, 2007, 7 (09) :2613-2617

[8] Size effects on the optical properties of organic nanoparticles [J].

Fu, HB ;

Yao, JN .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (07) :1434-1439

[9]

Fu HB, 2002, ANGEW CHEM INT EDIT, V41, P962, DOI 10.1002/1521-3773(20020315)41:6<962::AID-ANIE962>3.0.CO

[10]

2-9

← 1 2 3 →