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Spectroscopic Study on Interaction of/3-Cyclodextrin with Triprolidine Hydrochloride

Chinese Journal of Chemistry 2006年第5期24卷 665-668页

作者： ali, syed mashhood asmat, fahmeena Department of Chemistry Aligarh Muslim University Aligarh 202002 UP India

The complexation of triprolidine hydrochloride （TRP） and β-cyclodextrin （β-CD） in deuterium oxide was investigated by 400 MHz 1^H NMR spectroscopy. The 800 MHz 2D ROESY data revealed that two 1 ：1 and one 2 ： 1 β-CD-TRP inclusion complexes were formed. Both aromatic moieties （p-tolyl and pyridyl ring） has entered into the β-CD cavity, confirming the existence of two different equilibria for 1 ： 1 inclusion complexes in which p-tolyl ring of the guest is more tightly held by the host cavity. The ROE intermolecular interactions provided the plausible structures of these 1 ： 1 and 2 ： 1 stoichiometric inclusion complexes of β-CD-triprolidine hydrochloride in solu- tion.

关键词： host-guest complex β-cyclodextrin triprolidine hydrochloride 1^H NMR ROESY

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Structure Elucidation of Benzhexol-<i>β</i>-Cyclodextrin Complex in Aqueous Medium by <sup>1</sup>H NMR Spectroscopic and Computational Methods

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Journal of Encapsulation and Adsorption Sciences 2014年第3期4卷 63-70页

作者： syed mashhood ali Shazia Shamim Department of Chemistry Aligarh Muslim University Aligarh India

Complexation of benzhexol and β-cyclodextrin was studied in aqueous medium. The formation of inclusion complex and its stoichiometry were determined by NMR titration method. ROESY spec-trum, recorded with a mixing time of 0.5 s in few minutes, displayed crosspeaks between phenyl ring of benzhexol and β-cyclodextrin cavity protons established the inclusion of phenyl ring into the cavity. No inference about the distances between interacting protons could be drawn due to spin diffusion. However, analysis of peak intensity ratios of intermolecular crosspeaks suggested partial penetration of phenyl ring from wider side. Molecular mechanics studies supported these conclusions and the lowest energy conformation was proposed as the probable structure of 1:1 benzhexol-β-cyclodextrin complex.

关键词： β-Cyclodextrin Benzhexol ROESY Molecular Mechanics

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Numerical Investigation of Wind Flow around a Cylindrical Trough Solar Collector

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Journal of Power and Energy Engineering 2015年第1期3卷 1-10页

作者： Seyyed Mohammad Nima Shojaee Mohammad Adel Moradian mashhood mashhoodi Faculty of Mechanical and Aerospace Engineering Science and Research Branch Islamic Azad University Tehran Iran School of Mechanical and Manufacturing Engineering University of New South Wales Sydney Australia Young Researchers and Elites Club Science and Research Branch Islamic Azad University Tehran Iran

The goal of this study is to model the effects of wind on Cylindrical Trough Collectors (CTCs). Two major areas are discussed in this paper: 1) heat losses due to wind flow over receiver pipe and 2) average forces applied on the collector’s body. To accomplish these goals a 2D modeling of CTC was carried out using commercial codes with various wind velocities and collector orientations. Ambient temperature was assumed to be constant at 300 K and for specific geometries different meshing methods and boundary conditions were used in various runs. Validation was done by comparing the simulation results for a horizontal collector with empirical data. It was observed that maximum force of 509.1 Newton per Meter occurs at +60 degrees. Nusselt number is almost the constant for positive angles while at negative angles it varies considerably with the collector’s orientation.

关键词： Component Flow Analysis Wind Forces Solar Collectors Cylindrical Trough Collector Computational Solar Energy

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