Disk-like liquid crystals of transition metal complexes. Part 20.‡—Pursuit of chemistry to directly visualize van der Waals interactions

1998 ◽  
Vol 8 (9) ◽  
pp. 1971-1977 ◽  
Author(s):  
Kazuchika Ohta ◽  
Mayumi Ikejima ◽  
Mitsuo Moriya ◽  
Hiroshi Hasebe ◽  
Iwao Yamamoto
Keyword(s):  
Liquid Crystals ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Van Der Waals ◽  
Van Der Waals Interactions

scholarly journals In vitro Interactions of Secnidazole and Its Iron (II), Copper (II) Complexes with Bovine Serum Albumin by Fluorescence Quenching Method

2020 ◽  
Vol 23 (1) ◽  
pp. 1-9
Author(s):  
Md Jamal Hossain ◽  
Md Zakir Sultan ◽  
Mohammad A Rashid ◽  
Md Ruhul Kuddus
Keyword(s):  
Bovine Serum Albumin ◽  
Transition Metal ◽  
Fluorescence Quenching ◽  
Serum Albumin ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bovine Serum ◽  
Spectroscopic Method ◽  
Van Der Waals Interactions

The current study was designed to investigate the interactions of an antimicrobial drug secnidazole and its two transition metal complexes with bovine serum albumin (BSA). The interactions of secnidazole and its both transition metal complexes were confirmed by the extingushing of fluorescence intensity of the protein. The fluorescence quenching of BSA by the drug and its both metal complexes showed a static quenching process and the reactions followed exothermic mechanism. The fluorescence spectroscopic method was utilized to evaluate the thermodynamic parameters like change of enthalpy (ΔH), entropy (ΔS) and Gibb’s free energy (ΔG) which indicated the bindings of the antimicrobial agent and its both metal chelates were hydrogen bonding and van der Waals interactions. The binding constant and the number of binding sites were also measured by double log plot that indicated the drug or its metal complexes bound with BSA at 1:1 ratio. Bangladesh Pharmaceutical Journal 23(1): 1-9, 2020

Discotic liquid crystals of transition metal complexes X. Phthalocyanine derivatives substituted withn-alkyloxyphenyl side chains

1991 ◽  
Vol 10 (3) ◽  
pp. 357-368 ◽  
Author(s):  
Kazuchika Ohta ◽  
Takuya Watanabe ◽  
Satoshi Tanak ◽  
Testsuya Fujimoto ◽  
Iwao Yamamoto ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Side Chains ◽  
Discotic Liquid Crystals
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