A bis(dihydroxychlorin) osmate ester is formed as a side product in the osmylation of meso-tetraphenylporphyrin. The product can also be formed in good yield along well-known reaction pathways of osmate esters by treatment of the monomeric chlorin diol osmate ester bispyridine complex with acid. The dimer was spectroscopically characterized. The free base dimer can be metalated with zinc(II). The bis([dihydroxychlorinato]zinc) osmate ester dimer was spectroscopically and structurally characterized, showing its clamshell architecture with a 42${}^{\circ }$ angle between the mean planes of the two metallochlorin chromophores and a 9.11 Å zinc-to-zinc separation. Upon reaction with dimethylaminopyridine (DMAP), the clamshell structure pivots around the osmium center and arranges the two chromophores, each zinc center coordinated to DMAP, in maximum separation from each other, as shown by structural analysis. Preliminary ¹H NMR titration data are presented that show the bis-zinc clamshell structure to form a 1:1 supramolecular complex with diethylenetriamine (DETA), expressing a three-point recognition motive: the terminal amine functionalities coordinate to the zinc ions in each half-shell, thus bridging both chromophores, and the central amine functionality was deduced to be H-bonded to the osmium oxo group pointing toward the inside of the host. The UV-vis spectroscopic response upon DETA binding shows greater complexity in the interaction at higher ligand:host ratios, suggesting multiple binding modes. A similarly complex binding situation is also observed for the interactions of the chlorin osmate ester monomer with DETA.

双(二羟基二氢卟酚)锇酸酯作为内消旋-四苯基卟啉锇基化过程中的副产物形成。通过用酸处理单体二氢卟酚二醇锇酸酯双吡啶络合物，也可以沿着众所周知的锇酸酯反应途径以良好的收率形成产物。对二聚体进行了光谱表征。游离碱二聚体可以用锌(II)金属化。对双([二羟基氯化]锌)锇酯二聚体进行了光谱和结构表征，显示其蛤壳结构，具有 42${}^{\circ }$两个金属二氢卟酚发色团的平均平面之间的角度和 9.11 Å 锌与锌的分离。与二甲氨基吡啶 (DMAP) 反应后，蛤壳结构围绕锇中心旋转并排列两个发色团，每个锌中心与 DMAP 配位，彼此最大程度分离，如结构分析所示。初步¹H NMR 滴定数据显示双锌蛤壳结构与二亚乙基三胺 (DETA) 形成 1:1 超分子复合物，表达了三点识别动机：末端胺官能团与每个半壳中的锌离子配位，从而桥接两个发色团，并且推断中心胺官能团与指向主体内部的锇氧基团通过氢键键合。DETA 结合时的紫外-可见光谱响应显示配体：主体比率较高时相互作用更加复杂，表明存在多种结合模式。二氢锇酸酯单体与 DETA 的相互作用也观察到类似的复杂结合情况。