摘要
通过固相法合成了一系列氯羟磷灰石(ClHAp)固溶体,经FTIR表征发现,纯羟基磷灰石(HAp)的羟基振动频率为3572cm-1和632cm-1。当Cl-进入HAp晶体结构后,在3494cm-1和673cm-1处各出现新的吸收谱带,说明在其通道结构中形成[Cl…HO]氢键,导致羟基的伸缩振动向低频偏移,弯曲振动向高频偏移。与氟羟磷灰石的FTIR谱比较可知:ClHAp的羟基振动谱带的位置与数量主要受氢键和周围结构环境变化程度影响。
A series of chlorinated hydroxyapatite（ClHAp） solid solutions composed of hydroxyapatite and chlo-rapatite were synthesized by the solid reaction method and were investigated using FTIR spectroscopy. In the experiment, vibration frequency of the hydroxyl group appeared at 3 572 and 632 cm^-1 in pure hydroxyapatite （HAp）. When Cl ions entered the crystal structure of HAp, a new absorption band was observed at 3 494 and 673 cm^-1 respectively. These phenomena indicated that the hydrogen-bond forming in the channel structure made the stretching band shift towards a lower frequency and also resulted in the flexual band shift towards a higher frequency. A comparison with the FTIR spectra of fluoridated hydroxyapatite showed that the location and amount of vibration bands of the hydroxyl group in ClHAp were mainly affected by the hydrogen-bond and its surrounding structural variation.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2007年第4期371-374,共4页
Acta Petrologica et Mineralogica
基金
湖北省科技攻关计划项目(2006AA101c45)
关键词
氯羟磷灰石
FTIR
氢键
通道离子
chlorinated hydroxyapatite
FTIR
hydrogen-bond
channel ions
