Thieno[1,3,2]oxazaborinine-containing aza-BODIPYs with near infrared absorption bands: synthesis, photophysical properties, and device applications
作者:Yuji Kubo、Takuma Shimada、Kentaro Maeda、Yuta Hashimoto
DOI:10.1039/c9nj04612g
日期:——
As part of an ongoing study of near infrared (NIR) absorbing dyes applicable to optoelectronics, thieno[1,3,2]oxazaborinine-containing aza-BODIPYs were synthesized for the first time. 3,5-Di(thiophene)-substituted N2O2-type 1 showed a NIR absorption band centered at 780 nm, with a molar extinction coefficient (εmax) of 5.51 × 104 M−1 cm−1 in CH2Cl2; however, it was easily hydrolyzed in solution. In
作为正在进行的适用于光电子学的近红外(NIR)吸收染料研究的一部分,首次合成了含噻吩并[1,3,2]氧杂硼嘌呤的aza-BODIPY。3,5-二(噻吩) -取代Ñ 2 ö 2型1显示出NIR吸收带中心在780nm处,与摩尔消光系数(ε最大的5.51×10)4中号-1厘米-1的CH 2 Cl 2 ; 但是,它很容易在溶液中水解。相比之下,含3-噻吩的N 2 O型类似物2和3有更高的稳定性,和NIR吸收带在768纳米(ε最大= 8.62×10 4中号-1厘米-1)和779纳米(ε最大= 6.32×10 4中号-1厘米-1分别地),在CH 2 Cl 2。值得注意的是,这些染料的吸收带比迄今为止报道的所有结构受约束的氮杂-BODIPY吸收带更长。CV测量和理论计算表明,这种变化是将噻吩掺入aza-BODIPY核中而产生的较高HOMO能级的结果。作为潜在的设备应用,3在氧化铟锡(ITO)上制备负载膜