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Theoretical Study on Interactions between N-Butylpyridinium Nitrate and Thiophenic Compounds
Renqing Lü,Dong Liu,Shutao Wang,Yukun Lu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
By using density functional theory calculations, we have performed a systemic study on the electronic structures and topological properties of interactions between N-butylpyridinium nitrate ([BPY]+[NO3]−) and thiophene (TS), benzothiophene (BT), dibenzothiophene (DBT), naphthalene (NAP). The most stable structure of [BPY]+[NO3]− ion pair indicates that hydrogen bonding interactions between oxygen atoms on [NO3]− anion and C2-H2 on pyridinium ring play a dominating role in the formation of ion pair. The occurrence of hydrogen bonding, π···H-C, and π···π interactions between [BPY]+[NO3]− and TS, BT, DBT, NAP has been corroborated at the molecular level. But hydrogen bonding and π···π interactions between [BPY]+[NO3]− and NAP are weak in terms of structural properties and NBO, AIM analyses. DBT is prior to adsorption on N-butylpyridinium nitrate ionic liquid.
Theoretical Study on Interactions between N-Butylpyridinium Nitrate and Thiophenic Compounds
Lu, Renqing,Liu, Dong,Wang, Shutao,Lu, Yukun Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.6
By using density functional theory calculations, we have performed a systemic study on the electronic structures and topological properties of interactions between N-butylpyridinium nitrate ($[BPY]^+[NO_3]^-$) and thiophene (TS), benzothiophene (BT), dibenzothiophene (DBT), naphthalene (NAP). The most stable structure of $[BPY]^+[NO_3]^-$ ion pair indicates that hydrogen bonding interactions between oxygen atoms on $[NO_3]^-$ anion and C2-H2 on pyridinium ring play a dominating role in the formation of ion pair. The occurrence of hydrogen bonding, ${\pi}{\cdots}$H-C, and ${\pi}{\cdots}{\pi}$ interactions between $[BPY]^+[NO_3]^-$ and TS, BT, DBT, NAP has been corroborated at the molecular level. But hydrogen bonding and ${\pi}{\cdots}{\pi}$ interactions between $[BPY]^+[NO_3]^-$ and NAP are weak in terms of structural properties and NBO, AIM analyses. DBT is prior to adsorption on N-butylpyridinium nitrate ionic liquid.
김진수,Renqing Wang,Peter G. Gorovoy,권해연 한국산림과학회 2004 한국산림과학회지 Vol.93 No.2
I-SSR variants were analyzed to estimate level and distribution of genetic diversity in 19 populations of Japanese red pine in Korea (10 populations), China (6 populations), and Russia (3 populations). A total of 66 I-SSR variants were observed in the analyzed 551 individuals. All the analyzed individuals could be identified by DNA fingerprints-like individual specific amplicon profiles. Relatively higher level of genetic diversity within populations was observed in 19 populations of Japanese red pine (mean of 0.396) than other tree species. From the results of AMOVA with all 19 populations, relatively high degree of genetic differentiation ( ST=0.199) was allocated among populations although majority of genetic diversity was distributed within populations (80.01%), After dividing 19 populations into 3 geographic groups, the degree of population differentiation within groups was lowered to 0.153. The degree of population differentiation was decreased more to ST=0.135 by including only 10 Korean populations. Genetic relationships among 19 populations, reconstructed by UPGMA method, revealed 2 weak genetic groups. Three Russian populations were grouped with the most distantly located Chinese population of Xu Gou instead of 2 closely located Chinese populations of Mu Dan Jiang and Long Jing. The overall genetic relationships among the 19 populations were not coincided with geographic affinity. The discrepancy between genetic relationships and geographical distribution among the populations suggested that the analyzed populations might be undergone random changes in genetic composition. The probable cause of the random changes was discussed. PCR-RFLP analyses of mtDNA revealed no variation among 57 individuals selected from 19 populations. Results obtained in this study suggested that more careful approach should be made for preparing strategy for gene conservation of Japanese red pine in Korea, China, and Russia.
Flora of Offshore Islands in Shandong Province
Li, Ming,Qing Wang,Meijuan Zong,Renqing Wang 한국생태학회 2004 Journal of Ecology and Environment Vol.27 No.2
There are 474 species of native vascular plant distributed in offshore islands in Shandong Province, which belong to 262 genera and 82 families. The distribution types of genera of seed plant were classified into 15 types. Temperate characteristic is dominant in the flora of offshore islands and tropical characteristic ranks secondary. Therefore, some islands play the role of stepping islands. Furthermore, 98.85% of the total genera are monotypic or bitypic which shows the offshore habitat heterogeneity in Shandong Province.