Spectroscopic Investigation and Theoretical Modeling of Benzothiadiazole-Based Charge-Transfer Chromophores: From Solution to Nanoaggregates

被引：26

作者：

Bardi, Brunella ^{[1
]}

Dall'Agnese, Chunxiang ^{[2
,3
]}

Ching, Kathleen I. Moineau-Chane ^{[2
,3
]}

Painelli, Anna ^{[1
]}

Terenziani, Francesca ^{[1
]}

机构：

[1] Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy

[2] CNRS, LCC, 205 Route Narbonne, F-31077 Toulouse, France

[3] Univ Toulouse, UPS, LCC, F-31077 Toulouse, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2017年 / 121卷 / 32期

关键词：

FLUORESCENT ORGANIC NANOPARTICLES; ENHANCED 2-PHOTON ABSORPTION; QUADRUPOLAR CHROMOPHORES; SYMMETRY-BREAKING; SMALL MOLECULES; PHOTOVOLTAIC PROPERTIES; CONJUGATED MOLECULES; AGGREGATION; DONOR; DYES;

D O I：

10.1021/acs.jpcc.7b04647

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：

Experimental and theoretical investigations are presented on four quadrupolar molecules constituted of a central electron-acceptor 2,1,3-benzothiadiazole conjugated at both sides with electron-donating thiophene (or 2,2'-bithiophene) substituted groups. Previous investigation of their physicochemical properties demonstrated that thermally induced self-organization might be achieved for one of them. In this study, we further explore the structure-properties relationships for these quadrupolar chromophores also examining their aggregation behavior in organic nanoparticles. Strong spectroscopic evidence of J-aggregates formation is obtained, favored by the presence of branched terminalt alkyl chains. The surprisingly low fluorescence quantum yield of these J-aggregates is rationalized within the essential-state model approach.

引用

页码：17466 / 17478

页数：13

共 80 条

[1]

Allouche J., 2013, NANOMATERIALS DANGER, P27, DOI [DOI 10.1007/978-1-4471-4213-3, 10.1007/978-1-4471-4213-3_2, DOI 10.1007/978-1-4471-4213-32]

[2] Figures of merit of push-pull molecules in photorefractive polymers [J].