Controlled molecular assemblies of chiral boron dipyrromethene derivatives for circularly polarized luminescence in the red and near-infrared regions
Controlled molecular assemblies of chiral boron dipyrromethene derivatives for circularly polarized luminescence in the red and near-infrared regions
复制标题
手性硼二吡咯亚甲基衍生物的受控分子组装，用于红色和近红外区域的圆偏振发光
DOI：
10.1039/d2tc05006d
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发表时间：
2023
影响因子：
6.4
通讯作者：
Hasobe Taku
中科院分区：
文献类型：
--
作者：
Sakai Hayato;Suzuki Yudai;Tsurui Makoto;Kitagawa Yuichi;Nakashima Takuya;Kawai Tsuyoshi;Kondo Yuta;Matsuba Go;Hasegawa Yasuchika;Hasobe Taku
合成了手性1，1 ′-联-2-萘酚（BINOL）取代的硼二吡咯亚甲基（BODIPY）衍生物（nPh-B-BODIPY; n = 0，1，2），研究了其在红光和近红外（NIR）区域的聚集增强发光和圆偏振发光（CPL）.当将nPh-B-BODIPY的THF溶液注入水中时，0 Ph-B-BODIPY经历受控的自组装以产生纤维状纳米结构，而1 Ph-B-BODIPY和2 Ph-B-BODIPY中形成球形纳米颗粒。OPh-B-BODIPY纳米纤维的吸收光谱和圆二色性光谱显示出对应于0-0带的红移和分裂光谱，表明相邻的OPh-B-BODIPY单元之间存在强相互作用。这种纤维组装体由于多种聚集态而表现出具有从可见光到近红外（NIR）区域的多个谱带的宽发射光谱。因此，OPh-B-BODIPY纳米纤维在红色至NIR区域中表现出宽的圆偏振发光（CPL）光谱，以及相对于OPh-B-BODIPY（单体）和1 Ph-B-BODIPY纳米颗粒增强的不对称因子（glum）。
Chiral 1,1′-bi-2-naphthol (BINOL)-substituted boron dipyrromethene (BODIPY) derivatives with different numbers of phenyl groups at the 2 and 6 positions (denoted as nPh-B-BODIPY; n = 0, 1, 2) were newly synthesized to examine the aggregation-enhanced emission and circularly polarized luminescence (CPL) in the red and near-infrared (NIR) regions. Upon injection of THF solution of nPh-B-BODIPY into H2O, 0Ph-B-BODIPY underwent controlled self-assembly to produce fibrous nanoarchitectures, whereas spherical nanoparticles were formed in 1Ph-B-BODIPY and 2Ph-B-BODIPY. Absorption and CD spectra of 0Ph-B-BODIPY nanofibers demonstrated a red-shifted and split spectrum corresponding to the 0-0 band, suggesting strong interaction between neighbouring 0Ph-B-BODIPY units. Such fibrous assemblies exhibited a broad emission spectrum with multiple bands ranging from the visible to the near-infrared (NIR) region due to the multiple aggregate states. Consequently, 0Ph-B-BODIPY nanofibers demonstrated a broad circularly polarized luminescence (CPL) spectrum in the red to NIR regions together with the enhanced dissymmetry factors (glum) relative to 0Ph-B-BODIPY (monomer) and 1Ph-B-BODIPY nanoparticles.