Modified asynchronous orthogonal sample design scheme @ Job’s method to determine the stoichiometric ratio in the molecular association system

2020 ◽  
Vol 1206 ◽  
pp. 127757
Author(s):  
Xiaopei Li ◽  
Yongjie Zhang ◽  
Yizhuang Xu
Keyword(s):  
Molecular Association ◽  
Stoichiometric Ratio ◽  
Sample Design ◽  
Design Scheme ◽  
Job's Method

A Novel Approach Based on Two-Dimensional Correlation Spectroscopy to Determine the Stoichiometric Ratio of Two Substances Involved in Intermolecular Interactions

2019 ◽  
Vol 73 (9) ◽  
pp. 1051-1060 ◽  
Author(s):  
Xiaopei Li ◽  
Yiwei Zeng ◽  
Gang Deng ◽  
Yizhuang Xu ◽  
Yukihiro Ozaki ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Correlation Spectroscopy ◽  
Model Systems ◽  
Stoichiometric Ratio ◽  
Chemical Systems ◽  
Supramolecular Aggregate ◽  
Novel Approach ◽  
Job's Method

A novel technique called AOSD@Job’s, combining asynchronous orthogonal sample design scheme (AOSD) with Job’s method, is proposed to estimate the stoichiometric ratio of two substances that form a supramolecular aggregate under intermolecular interactions. First, a mathematical analysis was performed along with the procedure of the AOSD@Job’s method. Then, the validity of the AOSD@Job’s method was manifested by computer simulation on two model systems. Finally, the AOSD@Job’s method was applied on two real chemical systems. The stoichiometric ratio between the coordination complex of Ni2+ and ethylenediaminetetraacetic acid disodium salt (EDTA) was estimated to be 1.0. Benzyl alcohol (BA) and β-cyclodextrin (β-CD) were determined to form a 1 : 1 host–guest complex. These values were consistent with the values reported in the literature. Compared with the traditional Job’s method, the AOSD@Job’s method has an evident advantage since it is still valid even if all the peaks of the supramolecular aggregate severely overlap with the peaks of the substances that form the aggregate.

Patterns of cross peaks in 2D synchronous spectrum generated by using orthogonal sample design scheme

2008 ◽  
Vol 883-884 ◽  
pp. 129-136 ◽  
Author(s):  
Jing Chen ◽  
Chengfeng Zhang ◽  
Huizhen Li ◽  
Yufeng Liu ◽  
Weihong Li ◽  
...  
Keyword(s):  
Sample Design ◽  
Design Scheme

Modified orthogonal sample design scheme to probe intermolecular interactions

2008 ◽  
Vol 883-884 ◽  
pp. 124-128 ◽  
Author(s):  
Yuhai Liu ◽  
Chengfeng Zhang ◽  
Shaoxuan Liu ◽  
Ying Zhao ◽  
Dujin Wang ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Sample Design ◽  
Design Scheme

Double Asynchronous Orthogonal Sample Design Scheme for Probing Intermolecular Interactions

2012 ◽  
Vol 116 (45) ◽  
pp. 10904-10916 ◽  
Author(s):  
Jing Chen ◽  
Quan Bi ◽  
Shaoxuan Liu ◽  
Xiaopei Li ◽  
Yuhai Liu ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Sample Design ◽  
Design Scheme

Study of the Reaction of Platinum(IV) with Dimethylglyoxime by UV Spectrophotometry

2003 ◽  
Vol 68 (6) ◽  
pp. 1065-1075
Author(s):  
Marija Georgieva ◽  
Blagoja Andonovski
Keyword(s):  
Molar Absorptivity ◽  
Uv Spectrophotometry ◽  
Stoichiometric Ratio ◽  
Buffer Solution ◽  
Complex Species ◽  
Ph Variation ◽  
Molar Ratios ◽  
Effects Of Ph ◽  
The Stability ◽  
Job's Method

The complex formation of dimethylglyoxime and platinum(IV) in alkaline medium has been investigated by ultraviolet spectroscopy. This study has shown that more than one complex species exists in solution. The effects of pH variation of ammonia buffer solution from 6.0 to 13.0 were investigated with respect to the absorption spectra. The molar ratios method, the Job's method and the method of relative recovery of complex species were used. It was found that the stoichiometric ratio Pt(IV)/dimethylglyoxime was 1:1, 1:2 and 2:1. The molar absorptivity (log ε = 4.1 at 260 nm) and the formation constant of the complex (log K2,1 = 15.0) were obtained. The stability constants of the [Pt(Hdmg)2(NH3)2] complex determined by the molar ratios and Job's method were log β2 = 9.2 ± 0.2 and log β2 = 9.3 ± 0.2, respectively.

Orthogonal Sample Design Scheme for Two-Dimensional Synchronous Spectroscopy and its Application in Probing Intermolecular Interactions

2007 ◽  
Vol 61 (12) ◽  
pp. 1359-1365 ◽  
Author(s):  
Jian Qi ◽  
Huizhen Li ◽  
Kun Huang ◽  
Huhe Chen ◽  
Shaoxuan Liu ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Two Dimensional ◽  
Sample Design ◽  
Design Scheme
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