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本文报道新试剂２－羟基苄叉罗丹宁（２－ＨＢＲ）的合成，用分光光度法测定２－ＨＢＲ的离解常数，ｐＫａ１＝９．４３，ｐＫａ２＝１１．７１．研究了２－ＨＢＲ与钯的配位反应．在ｐＨ１１．０的缓冲介质中，Ｐｄ（Ⅱ）－ＨＢＲ配合物λｍａｘ为５２８ｎｍ，ε５２８为３．０３×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，测得Ｐｄ（Ⅱ）－ＨＢＲ配合物中Ｐｄ：ＨＢＲ为１∶２，稳定常数ｌｏｇＫｐｄＲ２＝１３．４５
In this paper, the synthesis of 2-hydroxybenzalorrhodin (2-HBR) was reported. The dissociation constants of 2-HBR were determined by spectrophotometry with pKa1 = 9.43 and pKa2 = 11.71. The coordination reaction between 2-HBR and palladium was studied. The Pd (Ⅱ) -HBR complex with pH λmax of 528 nm and ε528 of 3.03 × 104 L · mol-1 · cm-1 was obtained in pH 11.0 buffer solution. The Pd (Ⅱ) The HBR is 1: 2 and the stability constant logKpdR2 = 13.45