Citation: LI Mingjian, WANG Yuxiao, FENG Hui, FENG Changjun. Topological models of retention index of thin-layer chromatogram for chiral organic acids[J]. Chinese Journal of Chromatography, ;2014, 32(3): 242-247. doi: 10.3724/SP.J.1123.2013.10018 shu

Topological models of retention index of thin-layer chromatogram for chiral organic acids

1.
School of Chemistry & Chemical Engineering, Xuzhou Institute of Technology, Xuzhou 221111, China

Corresponding author: FENG Changjun,
Received Date: 24 October 2013
Available Online: 20 December 2013
Fund Project: 国家自然科学基金项目(21075138) (21075138)环境模拟与污染控制国家重点联合实验室开放基金项目(13K02ESPCT) (13K02ESPCT)徐州市科技局基金项目(XM13B111). (XM13B111)

On the basis of Kier's molecular connectivity indices and conjugated matrix, novel molecular connectivity indices (^mG_t^v) were defined and calculated for 18 chiral hydroxyl acids and amino acids. The chiral connectivity indices (^mC_t^v) were introduced by extending ^mG_t^v: ^mC_t^v=^mG_t^v×w_j, where w_j is the chiral index. The quantitative structure-retention index relationship (QSRR) between the retention index (R_M) of thin-layer chromatogram for the chiral organic acids and ^mC_t^v was studied by multivariate statistical regression. By leaps-and-bounds regression analysis, the best four-parameter QSRR model was set up, and the traditional correlation coefficient (R²) and the cross-validation correlation coefficient (Q²) of leave-one-out (LOO) were 0.973 and 0.950, respectively. The results demonstrated that the model was highly reliable and had good predictive ability from the point of view of statistics. From the four parameters (⁰C_p^v, ²C_p^v, C_ch^v, ⁵C_p^v) of the model, it is known that the dominant influence factors of the retention index were the molecular structure characteristics of two-dimensional and the space factors: the chiral characteristics, the flexibility and the puckered degree of molecules for the chiral organic acids. The results showed that the new parameter ^mC_t^v had good rationality and efficiency for the retention indices of the chiral organic acids. Therefore, an effective method was provided to predict the retention indices of the chiral organic acids.
- chiral hydroxyl acids,
- chiral amino acids,
- retention index,
- chiral index,
- novel connectivity index,
- novel chiral connectivity index
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