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以苯并碲唑季铵碘盐为原料，将其与3-乙基-2－（β-乙酰苯胺）乙烯苯并噻唑碘化季铵盐在无水吡啶中回流，得到4个含碲不对称碳菁染料．上述季铵盐与方酸的反应不同于一般杂环碱，只能发生1：1缩合反应，缩合产物与苯并噻唑碘盐在正丁醇／吡啶中反应即得含碲不对称方酸菁染料．该法避免了通常制备不对称方酸菁所带来的分离纯化的困难，从而提供了制备不对称方酸碲菁染料的通用方法，研究了不对称碲碳菁的“Brooker偏差”，结果符合一般规律．
Using benzotetrazole quaternary ammonium iodide as raw material, refluxing it with 3-ethyl-2- (β-acetanilide) vinylbenzothiazole quaternary ammonium iodide in anhydrous pyridine to obtain four tellurium- Symmetric carbonium cyanide dye. The quaternary ammonium salt and squarylium reaction is different from the general heterocyclic base, only 1: 1 condensation reaction occurs, the condensation product and benzothiazole iodine salt in n-butanol / pyridine to obtain a tellurium-containing asymmetric squarylium dye. The method avoids the difficulty of separation and purification which is usually prepared by asymmetric squaraine, thereby providing a general method for preparing asymmetrical squaric acid tellurocyanine. The “Brooker deviation” of asymmetric tellurocarbocyanine is studied, Results in line with the general rule.