Spectroscopic and Fluorescence Studies on the Trivalent Ce,Eu,Nd and La Metal Ions Rhodamine CFlorescent Dye Complexes  

作　　者：Moamen S.Refat Mahmoud Salman Akram M.El-Didamony Hammad Fetooh Eman S.E.Abd El-Maksoud Mohamed Y.El-Sayed 

机构地区：[1]Department of Chemistry,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia [2]Department of Chemistry,Faculty of Science,Al-Hussein Bin Talal University,P.O.Box 20 Ma’an,Jordan [3]Department of Chemistry,Faculty of Science,Zagazig University,Egypt [4]Chemistry Department,College of Science,Jouf University,P.O.Box:2014 Sakaka,Saudi Arabia

出　　处：《光谱学与光谱分析》2021年第10期3311-3315,共5页Spectroscopy and Spectral Analysis

基　　金：Taif University Researches Supporting Project number(TURSP-2020/01),Taif University,Taif,Saudi Arabia。

摘　　要：The four isolates solid complexes:[La(RHC)(NO_(3))_(2)]·3H_(2)O,[Nd(RHC)(NO_(3))_(2)]·4H_(2)O,[Eu(RHC)(NO_(3))_(2)]·2H_(2)O,and[Ce(RHC)(NO_(3))_(2)]·5H_(2)O that obtained by the reaction of the nitrate salts of the Ce(Ⅲ),Eu(Ⅲ),Nd(Ⅲ)and La(Ⅲ)ions and rhodamie C(RHC)ligand were interpretative using elemental analysis(C,H and N),molar conductivity,infrared,electronic,fluorescence and 1H-NMR spectra to achieve the speculated suitable formula.The low molar conductance values of the synthesized RHC complexes concluded the non-electrolytic behavior.The infrared spectra recorded the absence of stretching vibrationν(OH)of the—COOH and presence of two new vibration bands at 1597~1601 and 1383~1399 cm^(-1)which were assigned toνas(COO-)andνs(COO-).The difference between them revealed that the carboxylate group acts as a bidentate ligand.1HNMR spectra of Europium and lanthanum(Ⅲ)complexes were supported the FTIR results based on the absent of proton of the carboxylic group.Therefore,the microanalytical and spectroscopic results deduced that RHC acts as a monobasic bidentate ligand,and coordinated to the central metal(Ⅲ)ions via the two oxygen atoms of deprotonated carboxylic group.Fluorescence studies were performed on the metal complexes of Ce^(3+),Tb^(3+),Th^(4+),Gd^(3+)and La^(3+),that referred a quenching in the fluorescene intensity of rhodamine C in the aqueous state after complexation.The antimicrobial assessment against some kind of bacteria and fungi were also checked and recorded enhancement in case of their complexes.

关 键 词：Rhodamine C CHELATION SPECTROSCOPIC THERMOGRAVIMETRIC LANTHANIDES 

分 类 号：O433.4[机械工程—光学工程]