Physica Status Solidi B-Basic Research
An analytical perturbation formula of the gyromagnetic factor for the ground state 3A2(F) of d8 ions, in which not only the contribution from spin orbit coupling of the central transition metal ion but also that of ligand ions is included, are obtained in tetragonal symmetry. In the derivation, the contribution of all excited states for the g-factor is considered, and no adjustable parameter is introduced. The molecular orbital coefficients are determined by means of a semiempirical method for estimating the g-factor. The contribution of the spin-orbit coupling of ligand ions to the g-Shift is discussed in some pseudo-tetragonal Ni(II) compounds. The results show that the contribution must be considered, especially when the ligand ions have large spin-orbit coupling parameters. The calculation results agree well with experimental findings.
关键词:
ligands
杨洪梅
,
徐牛生
,
姚文斌
,
石磊
,
李金英
,
刘淑莹
应用化学
doi:10.11944/j.issn.1000-0518.2016.12.160147
三链DNA是一种具有众多生理学功能的生物大分子,可用于基因的表达调控,可以作为一种基因疗法的手段控制基因的转录和调节特定基因的表达。药物小分子与DNA的相互作用对于实现小分子的药理功能并介导相关生理过程都是非常重要的。在过去的几十年里,科学家们付出了很多努力来研究三链核酸的结合剂,然而报道的比较有效的筛选方法并不多。本文从提高TC型三链DNA稳定性的策略、三链DNA与结合剂相互作用的研究方法的原理及应用、研究方法的展望三方面展开论述。主要阐述了平衡透析法、纳米金比色法、多种核酸结构混合变温法、离心超滤法、电喷雾直接进样法、液质联用法和光谱学方法(紫外分光光谱、荧光光谱、圆二色光谱)等几种方法的原理、应用及存在的问题,对小分子配体与三链DNA相互作用的研究具有重要的意义。
关键词:
小分子配体
,
三链DNA
,
稳定性
,
筛选方法
,
应用