Squaraine Dyes as Efficient Coupling Bridges between Triarylamine Redox Centres
作者:Sebastian F. Völker、Manuel Renz、Martin Kaupp、Christoph Lambert
DOI:10.1002/chem.201102227
日期:2011.12.9
character due to the relatively low redox potential of the squarainebridge and are therefore compounds of Robin–Day class III. Thus we extended previous studies on organic mixed‐valence systems by using the indolenine squaraine moiety as very electron‐rich bridgebetween two electron‐donating amine redoxcentres to provoke a strong couplingbetween the additional redoxcentres. We synthesised TA3, which has
CHROMOPHORIC POLYMER DOTS WITH NARROW-BAND EMISSION
申请人:University of Washington through its Center for Commercialization
公开号:US20140350183A1
公开(公告)日:2014-11-27
Polymers, monomers, chromophoric polymer dots and related methods are provided. Highly fluorescent chromophoric polymer dots with narrow-band emissions are provided. Methods for synthesizing the chromophoric polymers, preparation methods for forming the chromophoric polymer dots, and biological applications using the unique properties of narrow-band emissions are also provided.
Three azulene-containing bis(squaraine) dyes were synthesized, among which BSQ1 showed distinct aggregation behaviors from the other two dimers and demonstrated excellent photothermal conversion efficiency. In nanoparticles, BSQ1 formed J-aggregates while BSQ2 and BSQ3 displayed H-aggregates. In films, BSQ1 presented the most significant rearrangement of aggregate structures upon thermal annealing with
合成了三种含有甘菊环的双方酸染料,其中BSQ1表现出与其他两种二聚体不同的聚集行为,并表现出优异的光热转换效率。在纳米颗粒中, BSQ1形成 J 聚集体,而BSQ2和BSQ3则显示 H 聚集体。在薄膜中, BSQ1在热退火时呈现出最显着的聚集结构重排,并具有改进的电荷传输能力。
Chromophoric polymer dots with narrow-band emission
申请人:University of Washington through its Center for Commercialization
公开号:US10150841B2
公开(公告)日:2018-12-11
Polymers, monomers, chromophoric polymer dots and related methods are provided. Highly fluorescent chromophoric polymer dots with narrow-band emissions are provided. Methods for synthesizing the chromophoric polymers, preparation methods for forming the chromophoric polymer dots, and biological applications using the unique properties of narrow-band emissions are also provided.
Squaraine-Based Polymer Dots with Narrow, Bright Near-Infrared Fluorescence for Biological Applications
作者:I-Che Wu、Jiangbo Yu、Fangmao Ye、Yu Rong、Maria Elena Gallina、Bryant S. Fujimoto、Yong Zhang、Yang-Hsiang Chan、Wei Sun、Xing-Hua Zhou、Changfeng Wu、Daniel T. Chiu
DOI:10.1021/ja5123045
日期:2015.1.14
This article describes the design and development of squaraine-based semiconducting polymer dots (Pdots) that show large Stokes shifts and narrow-band emissions in the near-infrared (NIR) region. Fluorescent copolymers containing fluorene and squaraine units were synthesized and used as precursors for preparing the Pdots, where exciton diffusion and likely through-bond energy transfer led to highly bright and narrow-band NIR emissions. The resulting Pdots exhibit the emission full width at half-maximum of similar to 36 nm, which is similar to 2 times narrower than those of inorganic quantum dots in the same wavelength region (similar to 66 nm for Qdot705). The squaraine-based Pdots show a high fluorescence quantum yield (QY) of 0.30 and a large Stokes shift of similar to 340 nm. Single-particle analysis indicates that the average per-particle brightness of the Pdots is similar to 6 times higher than that of Qdot705. We demonstrate bioconjugation of the squaraine Pdots and employ the Pdot bioconjugates in flow cytometry and cellular imaging applications. Our results suggest that the narrow bandwidth, high QY, and large Stokes shift are promising for multiplexed biological detections.