Cross-linked polystyrene copolymer beads with the average particle size in the range of (50–80 mesh size) were prepared by a new method, characterized and functionalized with titanium tetrachloride to afford the corresponding polystyrene‑titanium tetrachloride complex in one step reaction and characterized by FT-IR, UV, TGA, DSC, XRD, SEM, BET. This polymer metal complex (PS/TiCl₄) was used as a heterogeneous, recoverable, reusable Lewis acid for solvent-free Knoevenagel condensations of 1,3-diketones with aromatic aldehydes under green and mild conditions. The rate of reactions was found to decrease with an increasing percentage of crosslinking and the mesh size of the copolymer beads. This complex showed good stability and catalytic activity in the Knoevenagel reactions.

通过一种新方法制备了平均粒径在（50-80目）范围内的交联聚苯乙烯共聚物珠，用四氯化钛对其进行了表征和功能化，从而在一步反应中得到了相应的聚苯乙烯-四氯化钛配合物，并对其进行了表征。通过FT-IR，UV，TGA，DSC，XRD，SEM，BET。该聚合物金属配合物（PS / TiCl ₄）用作多相，可回收，可重复使用的路易斯酸，用于在绿色和温和条件下无溶剂的1,3-二酮与芳族醛的Knoevenagel缩合反应。发现反应速率随着交联百分比和共聚物珠粒的筛孔尺寸的增加而降低。该配合物在Knoevenagel反应中显示出良好的稳定性和催化活性。