The design, synthesis, structure, and binding affinity of two dioptic receptors for the selective molecular recognition of the cis,syn cyclobutane pyrimidine dimer are reported. The design is based on two 2,6-di(acetamino)pyridine recognition units that are covalently linked via triple bonds to an anthraquinone functional spacer unit. The convergent synthesis uses a modified Sonogashira reaction involving
报道了用于选择性分子识别顺式,顺式环丁烷嘧啶二聚体的两个屈光受体的设计,合成,结构和结合亲和力。该设计基于两个2,6-二(乙酰氨基)吡啶识别单元,它们通过三键共价连接至蒽醌功能性间隔基单元。收敛合成使用了涉及锌转金属的修饰的Sonogashira反应作为关键步骤。受体之一的晶体结构揭示了一种超分子一维聚合物,该聚合物具有较强的相互作用,该相互作用由形状自互补,π堆积和相邻分子之间的氢键介导。相邻链之间的氢键强制平行取向,从而导致高极性化合物的非中心对称晶体结构。受体的缔合常数为K a = 1.0×10 3 M - 1,具有顺式,顺式嘧啶二聚体,而反式,顺式异构体的结合力弱约1个数量级。
US9206180B2
申请人:——
公开号:US9206180B2
公开(公告)日:2015-12-08
SUPERSTRUCTURES OF DIKETOPYRROLOPYRROLE DONORS AND PERYLENEDIIMIDE ACCEPTORS FORMED BY HYDROGEN-BONDING AND PI...PI STACKING
申请人:New York University
公开号:US20140243531A1
公开(公告)日:2014-08-28
A quantitative model that describes the assembly of diketopyrrolopyrrole-based donors and a perylenediimide acceptor into chiral superstructures, as a result of both hydrogen bonding and π•••π stacking. This model provides thermodynamic parameters (ΔH° and ΔS°) for all noncovalent interactions involved in the assembly and explains the subtle supramolecular cues that convert disordered aggregates into well-defined helical assemblies.
Redox-Responsive H-Bonding: Amplifying the Effect of Electron Transfer Using Proton-Coupled Electron Transfer
作者:Hyejeong Choi、Kiyeol Baek、Sean T. Toenjes、Jeffrey L. Gustafson、Diane K. Smith
DOI:10.1021/jacs.0c07841
日期:2020.10.14
A new strategy to create highly redox-responsive H-bond dimers based on proton-coupled electrontransfer is proposed that capitalizes on the importance of secondary H-bonds in determining overall binding strength in H-bond dimers. Electrontransfer induced proton transfer across a H-bond can be used to significantly strengthen the overall binding by both creating strong ionic H-bonds and changing the
提出了一种基于质子耦合电子转移创建高度氧化还原响应性 H 键二聚体的新策略,该策略利用了次级 H 键在确定 H 键二聚体中的整体结合强度方面的重要性。通过产生强离子 H 键和将次级 H 键从不利变为有利,电子转移诱导的质子转移可用于显着增强整体结合。这种方法的可行性和效力通过电活性 DAD(A = H-受体,D = H-供体)阵列 H(MQ+)H 与电活性 ADA 阵列 O(NH)O 配对证明。H(MQ+)H 与 O(NH)O 在 0.1 M NBu4PF6/CD2Cl2 中的 NMR 滴定得到 500 M-1 的 Kassoc,典型的 DAD-ADA 二聚体。然而,在 0.1 M NBu4PF6/CH2Cl2 中进行双电子还原后,循环伏安法研究表明 1。结合强度增加了 8 × 105,对应于 9 × 107 M-1 的非常大的 Kassoc。后一个值是 DDD-AAA 氢键二聚体的典型值,与还原时质子通过中心氢键转移一致。