Covalent Organic Frameworks with Irreversible Linkages via Reductive Cyclization of Imines
作者:Sizhuo Yang、Chongqing Yang、Chaochao Dun、Haiyan Mao、Rebecca Shu Hui Khoo、Liana M. Klivansky、Jeffrey A. Reimer、Jeffrey J. Urban、Jian Zhang、Yi Liu
DOI:10.1021/jacs.2c02405
日期:2022.6.8
heterocycles as the linkages in the framework. Irreversible indazole and benzimidazolylidene (BIY) linkages are introduced into COFs for the first time via phosphine-induced reductive cyclization of the common imine linkages following either stepwise or one-pot reaction protocols. The successful linkage transformation introduces new functionalities, as demonstrated in the case of BIY-COF, which displays excellent
由于其结构独特性,共价有机框架 (COF) 在许多高级应用中显示出巨大的潜力。为了应对合成挑战,设计 COF 的孔隙率、结晶度和功能性的简便化学途径受到高度追捧。在这里,我们报告了一种合成方法,该方法利用 Cadogan 反应引入含氮杂环作为框架中的键。不可逆的吲唑和苯并咪唑亚基 (BIY) 键首次通过膦诱导的常见亚胺键的还原环化按照逐步或一锅反应方案引入 COF。成功的联动转换引入了新的功能,正如 BIY-COF 的案例所证明的那样,它表现出出色的内在质子传导性,无需用外部质子转移试剂浸渍。这种通用策略将为更广泛的功能性多孔晶体材料打开一扇窗。