BROWSE

Related Researcher

Author

Takayama, Shuichi
Cell and Microfluidics Lab
Research Interests
  • Bio-MEMS and Microfluidics

ITEM VIEW & DOWNLOAD

Room Temperature Phosphorescence of Metal-Free Organic Materials in Amorphous Polymer Matrices

Cited 0 times inthomson ciCited 5 times inthomson ci
Title
Room Temperature Phosphorescence of Metal-Free Organic Materials in Amorphous Polymer Matrices
Author
Lee, DongwookBolton, OnasKim, Byoung ChoulYouk, Ji HoTakayama, ShuichiKim, Jinsang
Keywords
Amorphous glassy polymers; Amorphous polymer matrices; Micro-fluidic devices; Phosphorescence quantum yield; Phosphorescent material; Room temperature phosphorescence; Simple device structures; Temperature-sensitive polymers
Issue Date
201304
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.135, no.16, pp.6325 - 6329
Abstract
Developing metal-free organic phosphorescent materials is promising but challenging because achieving emissive triplet relaxation that outcompetes the vibrational loss of triplets, a key process to achieving phosphorescence, is difficult without heavy metal atoms. While recent studies reveal that bright room temperature phosphorescence can be realized in purely organic crystalline materials through directed halogen bonding, these organic phosphors still have limitations to practical applications due to the stringent requirement of high quality crystal formation. Here we report bright room temperature phosphorescence by embedding a purely organic phosphor into an amorphous glassy polymer matrix. Our study implies that the reduced beta (beta)-relaxation of isotactic PMMA most efficiently suppresses vibrational triplet decay and allows the embedded organic phosphors to achieve a bright 7.5% phosphorescence quantum yield. We also demonstrate a microfluidic device integrated with a novel temperature sensor based on the metal-free purely organic phosphors in the temperature-sensitive polymer matrix. This unique system has many advantages: (i) simple device structures without feeding additional temperature sensing agents, (ii) bright phosphorescence emission, (iii) a reversible thermal response, and (iv) tunable temperature sensing ranges by using different polymers
URI
Go to Link
DOI
http://dx.doi.org/10.1021/ja401769g
ISSN
0002-7863
Appears in Collections:
SLS_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU