ICCAS OpenIR
Size-tunable emission from 1,3-diphenyl-5-(2-anthryl)-2-pyrazoline nanoparticles
Xiao, DB; Lu, X; Yang, WS; Fu, HB; Shuai, ZG; Fang, Y; Yao, JN
2003-06-04
Source PublicationJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN0002-7863
Volume125Issue:22Pages:6740-6745
AbstractOrganic nanoparticles of 1,3-diphenyl-5-(2-anthryl)-2- pyrazoline (DAP) ranging in average diameters from 40 to 160 nm were prepared through the reprecipitation method. The average diameters of the particles were controlled by variation of the aging time. We found that DAP nanoparticles exhibit the size-dependent optical properties. The absorption transitions of the nanoparticles at the lower-energy side experience a bathochromic shift with an increase in the particle size as a result of the increased intermolecular interactions, while the higher-energy bands of anthracene split possibly due to the electronic coupling between the pyrazoline ring of one molecule and the anthracene moiety of the neighboring molecule. Most interestingly, the nanoparticle emission in the blue light region from pyrazoline chromophore shifts to shorter wavelengths with an increase in the particle size, accompanied with a relatively gradual dominance of the emission at about 540 nm from an exciplex between the pyrazoline ring of one molecule and the anthracene moiety of the neighboring molecule. The hypsochromic shift in the emission of DAP nanoparticles was identified as originating from the pronounced decrease in the Stokes shift due to the restraint of vibronic relaxation and the configuration reorganization induced by the increased intermolecular interaction.
DOI10.1021/ja028674s
Indexed BySCI
Language英语
WOS IDWOS:000183314000038
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:245[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80564
Collection中国科学院化学研究所
Corresponding AuthorYao, JN
Affiliation1.Chinese Acad Sci, Key Lab Photochem, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Lab Organ Solids, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Xiao, DB,Lu, X,Yang, WS,et al. Size-tunable emission from 1,3-diphenyl-5-(2-anthryl)-2-pyrazoline nanoparticles[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2003,125(22):6740-6745.
APA Xiao, DB.,Lu, X.,Yang, WS.,Fu, HB.,Shuai, ZG.,...&Yao, JN.(2003).Size-tunable emission from 1,3-diphenyl-5-(2-anthryl)-2-pyrazoline nanoparticles.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,125(22),6740-6745.
MLA Xiao, DB,et al."Size-tunable emission from 1,3-diphenyl-5-(2-anthryl)-2-pyrazoline nanoparticles".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 125.22(2003):6740-6745.
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