磷脂酰胆碱LB单分子膜诱导下KDP晶体取向生长的研究  

Studies on Oriented Growth of KH_2PO_4 Crystals Under Phospholipid Monolayer

作　　者：李斌[1] 张希[1] 白玉白[1] 徐如人[1] 

机构地区：[1]吉林大学化学系

出　　处：《高等学校化学学报》2000年第2期185-186,共2页Chemical Journal of Chinese Universities

基　　金：教育部无机合成与制备化学研究开放实验室基金资助

摘　　要：Using a Langmuir-Blodgett film of dipalmitoylphosphatidylcholine(DPPC), a model of biomembranes, as a template, we succeed in obtaining oriented KH 2PO 4(KDP) crystals toward crystal face (100) under well-compressed DPPC monolayer. This is explicable in terms of the geometrical complementarity between KDP and the DPPC monolayer. It is found that the distances between the closest K-K (0.416 nm) fit the d(100) network spacing of DPPC monolayer(0.420 nm), which results in that the special activation energy for nucleation exists in the interface covered with DPPC monolayer. DPPC monolayer has a very strong selected catalysis on the crystallization of KDP crystal face (100), and drives KDP rapid and oriented nucleation on the monolayer/solution interface. The oriented KDP crystals show a good second harmonic generation(SHG) signal.Using a Langmuir-Blodgett film of dipalmitoylphosphatidylcholine(DPPC), a model of biomembranes, as a template, we succeed in obtaining oriented KH 2PO 4(KDP) crystals toward crystal face (100) under well-compressed DPPC monolayer. This is explicable in terms of the geometrical complementarity between KDP and the DPPC monolayer. It is found that the distances between the closest K-K (0.416 nm) fit the d(100) network spacing of DPPC monolayer(0.420 nm), which results in that the special activation energy for nucleation exists in the interface covered with DPPC monolayer. DPPC monolayer has a very strong selected catalysis on the crystallization of KDP crystal face (100), and drives KDP rapid and oriented nucleation on the monolayer/solution interface. The oriented KDP crystals show a good second harmonic generation(SHG) signal.

关 键 词：晶体生长 取向生长 磷酸二氢钾 非线性光学材料 

分 类 号：O614.113[理学—无机化学] TB39[理学—化学]