兰州大学学报（自然科学版）
蘭州大學學報（自然科學版）
란주대학학보（자연과학판）
JOURNAL OF LANZHOU UNIVERSITY（NATURAL SCIENCES）
2004年
5期
42-47
,共6页
铽(Ⅲ)测定%2,4-二羟基苯乙酮缩三羟基甲基氨基甲烷%荧光增强%六次甲基四胺
鋱(Ⅲ)測定%2,4-二羥基苯乙酮縮三羥基甲基氨基甲烷%熒光增彊%六次甲基四胺
특(Ⅲ)측정%2,4-이간기분을동축삼간기갑기안기갑완%형광증강%륙차갑기사알
terbium(Ⅲ) determination%2,4-dihydroxyl-acetophenonetriaminotriethylamine%fluorescence enhancement%hexamethylene tetramine
合成了一种新的席夫碱配体2,4-二羟基苯乙酮缩三羟基甲基氨基甲烷.该配体与铽(Ⅲ)的配合物的荧光强度在磷酸钠或六次甲基四胺的存在下可增强18或26倍.有机溶剂CH3CN,DMF,丙酮,THF,DMSO,CH3OH,C2H5OH的添加可使其荧光强度进一步增加3～19倍.其中,用CH3CN作溶剂时荧光增加倍数最大,Tb-HL-HMTM体系荧光最强.pH=6.0时,激发和发射波长分别是355和545 nm.在理想情况下,荧光强度与Tb3+离子浓度成正比.对于HL-Na3PO4-CH3CN体系,线性范围2.3×10-10～5.8×10-5 mol/L,检测限2.0×10-10 mol/L,对于HL-HMTM-CH3CN体系,线性范围9.8×10-11～7.2×10-5 mol/L,检测限9.0×10-11 mol/L.基于此对Tb3+进行定量测定,该分析方法简单、快速、灵敏、干扰小.同时对荧光增强的机理进行了分析和讨论.
閤成瞭一種新的席伕堿配體2,4-二羥基苯乙酮縮三羥基甲基氨基甲烷.該配體與鋱(Ⅲ)的配閤物的熒光彊度在燐痠鈉或六次甲基四胺的存在下可增彊18或26倍.有機溶劑CH3CN,DMF,丙酮,THF,DMSO,CH3OH,C2H5OH的添加可使其熒光彊度進一步增加3～19倍.其中,用CH3CN作溶劑時熒光增加倍數最大,Tb-HL-HMTM體繫熒光最彊.pH=6.0時,激髮和髮射波長分彆是355和545 nm.在理想情況下,熒光彊度與Tb3+離子濃度成正比.對于HL-Na3PO4-CH3CN體繫,線性範圍2.3×10-10～5.8×10-5 mol/L,檢測限2.0×10-10 mol/L,對于HL-HMTM-CH3CN體繫,線性範圍9.8×10-11～7.2×10-5 mol/L,檢測限9.0×10-11 mol/L.基于此對Tb3+進行定量測定,該分析方法簡單、快速、靈敏、榦擾小.同時對熒光增彊的機理進行瞭分析和討論.
합성료일충신적석부감배체2,4-이간기분을동축삼간기갑기안기갑완.해배체여특(Ⅲ)적배합물적형광강도재린산납혹륙차갑기사알적존재하가증강18혹26배.유궤용제CH3CN,DMF,병동,THF,DMSO,CH3OH,C2H5OH적첨가가사기형광강도진일보증가3～19배.기중,용CH3CN작용제시형광증가배수최대,Tb-HL-HMTM체계형광최강.pH=6.0시,격발화발사파장분별시355화545 nm.재이상정황하,형광강도여Tb3+리자농도성정비.대우HL-Na3PO4-CH3CN체계,선성범위2.3×10-10～5.8×10-5 mol/L,검측한2.0×10-10 mol/L,대우HL-HMTM-CH3CN체계,선성범위9.8×10-11～7.2×10-5 mol/L,검측한9.0×10-11 mol/L.기우차대Tb3+진행정량측정,해분석방법간단、쾌속、령민、간우소.동시대형광증강적궤리진행료분석화토론.
A new Schiff base ligand, 2, 4-dihydroxyl-acetophenonetriaminotriethylamine(HL), was synthesized and its fluorescence intensity with terbium(Ⅲ) increased by about 18 fold in the presenc of sodium phosphate(Na3PO4) or increased by about 26 fold in the presenc of hexamethylene tetramine(HM- TM).And when organic solvents(CH3CN, DMF, acetone, THF, DMSO, CH3OH, and C2H5OH) were added into the above system, the fluorescence intensities were further enhanced by about 3～19 folds, which was observed to be highest for the Tb-HL-HMTM-CH3CN system(to be about 500 fold). The spectrofluorimetric determination of trace amount of Tb3+ based on the phenomenon was carried out. The excitation and emission wavelengths are 355 and 545 nm, respectively. Under optimal conditions, the fluorescence intensities vary linearly with the concentration of Tb3+ in the range 2.3×10-10 ～5.8×10-5 mol/L with a detection limit of 2.0×10-10 mol/L(for HL-Na3PO4-CH3CN system) or 9.8×10-11 ～7.2×10-5 mol/L with a detection limit of 9.0×10-11 mol/L (for HL-HMTM-CH3CN system). The interferences of some rare earth metals and other inorganic ions were described. The method proves to be a selective, sensitive,rapid and simple analytical procedure for the determination of terbium(Ⅲ) in high-purity yttrium oxide and synthetic samples. The mechanism for the fluorescence enhancement was also studied.
