CN106905246A - 一种橙黄色荧光材料及其制备方法 - Google Patents

一种橙黄色荧光材料及其制备方法 Download PDF

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CN106905246A
CN106905246A CN201710142359.6A CN201710142359A CN106905246A CN 106905246 A CN106905246 A CN 106905246A CN 201710142359 A CN201710142359 A CN 201710142359A CN 106905246 A CN106905246 A CN 106905246A
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殷艺晅
李星
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Abstract

本发明公开了一种橙黄色荧光材料及其制备方法,该荧光材料化合物是具有一定空间结构的5‑硝基乳清酸镉的配合物,其结构简式:[KCd0.5L(H2O)2]n,L为脱去两个质子H的5‑硝基乳清酸;其化学式为:K2CdC10H10N6O16,晶系为单斜,空间群为P2(1)/c,晶包参数α=90°,β=98.67°,γ=90°,镉离子采用六配位变形的八面体构型的配位模式。所述橙黄色荧光材料的制备方法是将二水合醋酸镉与5‑硝基乳清酸钾形成混合液,用氢氧化钾稀溶液调解pH值,通过溶剂缓慢挥发方式得到了5‑硝基乳清酸镉配合物。该制备方法操作简单,成本低廉,适合规模化生产。本发明制得的化合物具有良好的橙黄色荧光发射性能,作为荧光材料具有潜在的应用前景。

Description

一种橙黄色荧光材料及其制备方法
技术领域
本发明属于发光材料的技术领域,具体是关于一种橙黄色荧光材料及其制备方法。
背景技术
荧光材料是指材料在外界光源进行照射下,从而获得能量,产生激发导致发光的现象。紫外辐射、可见光及红外辐射均可引起荧光材料发光。荧光材料有多种用途,用它可以制成街道路标、楼房门牌标号、消防安全标志、广告牌等。荧光材料广泛应用于在染料,光氧化剂,光学增白剂,化学及生物分析等诸多领域,它在药物学、生理学、环境科学、信息科学技术方面都有广阔的应用前景。
荧光材料,分为有机荧光材料和无机荧光材料。有机荧光材料通常具有能吸收激发光的基团或结构,通常是共轭键结构,如:共轭π键、苯环结构或类苯环结构。按照材料结构可以分为三类:(1)具有刚性结构的芳香稠环化合物;(2)具有共轭结构电荷转移化合物;(3)某些金属有机配合物,由于其具有结构复杂、组成成分可调、离子或原子成键形式多样等特点,近年来成为功能材料探索研究的热点,表明部分配合物作为荧光材料具有潜在的应用前景。
随着人们对荧光材料研究的日益深入,新的金属有机配合物作为荧光材料不断涌现。硝基乳清酸配合物作为荧光材料有少量的研究报道,如胡秀锋等人报道了一种紫色荧光材料及其制备方法,授权号CN102329610B;李星、邴月等人报道了紫色发光性能的镉-硝基乳清酸化合物(CrystEngComm,2011,13,6373)。本发明公开一种具有特定组成和空间结构的镉-硝基乳清酸配合物,在400nm激发光作用下该配合物在橙黄色光区有较强的荧光发射,最大发射峰600nm,其作为荧光材料具有潜在的应用前景。
发明内容
本发明要解决的技术问题是针对现有技术,提供一种具有良好橙黄色发射性的荧光材料及其制备方法。
本发明针对上述问题所采取的技术方案为:一种橙黄色荧光材料,该橙黄色荧光材料是具有一定空间结构的5-硝基乳清酸镉配合物,其结构简式:[KCd0.5L(H2O)2]n(L为脱去两个H的5-硝基乳清酸);其化学式为:K2CdC10H10N6O16,晶系为单斜,空间群为P2(1)/c,晶包参数 α=90°,β=98.67°,γ=90°,镉离子采用六配位变形的八面体构型的配位模式。
在400nm激发光作用下该5-硝基乳清酸镉配合物在橙黄色光区有较强的荧光发射,最大发射峰600nm。
上述橙黄色荧光材料的制备方法,包括以下步骤:
(1)称取一定量的二水合醋酸镉(Cd(Ac)2·2H2O)和一定量的5-硝基乳清酸钾置于烧杯中,使Cd(II)离子与5-硝基乳清酸物质量的比为1:1.5~2,加入适量的蒸馏水,Cd(II)离子的浓度为0.01~0.025mmol/mL,并加热搅拌,用0.2mol·L-1的KOH水溶液调解至pH=4.5~5.5,得到混合物水溶液;
(2)用滤纸将上述装有混合物水溶液的烧杯封口,然后置于鼓风干燥箱中,温度控制在25~45℃,3~5天后析出无色块状晶体;
(3)将无色块状晶体取出,用无水乙醇洗涤,干燥,即获得所述的橙黄色荧光材料。
优选的,所述参加反应的物质是化学纯。
与现有技术相比,本发明的优点在于:
以二水合醋酸镉和5-硝基乳清酸钾为原料进行化学反应合成了一种新型的5-硝基乳清酸镉配合物,该配合物作为一种橙黄色发光材料,具有准确的空间结构和准确的分子式;分子中含有共轭结构单元,有丰富光学性质的Cd(II)离子,吡啶N原子和羰基双键等,有利于电子跃迁与能量传递,从而使化合物具有良好的光学活性。所制备的材料具有良好的橙黄色发光性能,作为荧光材料具有良好的应用前景。
附图说明
图1为本发明的橙黄色荧光材料5-硝基乳清酸镉配合物的不对称结构单元图;
图2为本发明的橙黄色荧光材料5-硝基乳清酸镉配合物中金属离子的配位单元图;
图3为本发明的橙黄色荧光材料5-硝基乳清酸镉配合物的荧光发射光谱。
具体实施方式
以下结合附图实施例对本发明进行进一步详细讲述。
实施例1:
称取0.267g(1.0mmol)的Cd(Ac)2·2H2O,0.514g(2.0mmol)的5-硝基乳清酸钾单水合物置于250mL的烧杯中,加入100mL蒸馏水,并加热搅拌,用0.2mol·L-1的KOH水溶液调解至pH=4.5,得到混合物水溶液;用滤纸将上述装有混合物水溶液的烧杯封口,然后置于鼓风干燥箱中,温度控制在45℃,3天后析出无色块状晶体;将无色块状晶体取出,用无水乙醇洗涤,干燥,即获得5-硝基乳清酸镉配合物。
实施例2:
称取0.133g(0.5mmol)的Cd(Ac)2·2H2O,0.193g(0.75mmol)的5-硝基乳清酸钾单水合物置于150mL的烧杯中,加入20mL蒸馏水,并加热搅拌,用0.2mol·L-1的KOH水溶液调解至pH=5.5,得到混合物水溶液;用滤纸将上述装有混合物水溶液的烧杯封口,然后置于鼓风干燥箱中,温度控制在25℃,5天后析出无色块状晶体;将无色块状晶体取出,用无水乙醇洗涤,干燥,即获得5-硝基乳清酸镉配合物。
实施例3:
称取0.267g(1.0mmol)的Cd(Ac)2·2H2O,0.463g(1.8mmol)的5-硝基乳清酸钾单水合物置于250mL的烧杯中,加入80mL蒸馏水,并加热搅拌,用0.2mol·L-1的KOH水溶液调解至pH=5.0,得到混合物水溶液;用滤纸将上述装有混合物水溶液的烧杯封口,然后置于鼓风干燥箱中,温度控制在35℃,4天后析出无色块状晶体;将无色块状晶体取出,用无水乙醇洗涤,干燥,即获得5-硝基乳清酸镉配合物。
上述实施例中所制得的5-硝基乳清酸镉配合物为无色块状晶体,其化学式为:K2CdC10H10N6O16,其结构简式为:[KCd0.5L(H2O)2]n(L为脱去两个H的5-硝基乳清酸);其不对称结构单元图如图1所示,5-硝基乳清酸镉配合物中金属离子的配位单元图如图2所示(为了图示清晰,氢原子被省略,对称操作出来的原子没有标记)。
将所得到的5-硝基乳清酸镉配合物风干后进行荧光性能测试,该化合物显示了良好的橙黄色荧光发射性能,荧光光谱如图3所示。在400nm激发光作用下该5-硝基乳清酸镉配合物在橙黄色光区有较强的荧光发射,最大发射峰600nm。

Claims (3)

1.一种橙黄色荧光材料,其特征在于,该橙黄色荧光材料是具有一定空间结构的5-硝基乳清酸镉的配合物,其结构简式:[KCd0.5L(H2O)2]n,L为脱去两个质子H的5-硝基乳清酸;其化学式为:K2CdC10H10N6O16,晶系为单斜,空间群为P2(1)/c,晶包参数α=90°,β=98.67°,γ=90°,镉离子采用六配位变形的八面体构型的配位模式。
2.一种如权利要求1所述的橙黄色荧光材料的制备方法,其特征在于,包括以下步骤:
(1)称取一定量的二水合醋酸镉(Cd(Ac)2·2H2O)和一定量的5-硝基乳清酸钾置于烧杯中,使Cd(II)离子与5-硝基乳清酸物质量的比为1:1.5~2,加入适量的蒸馏水,使Cd(II)离子的浓度为0.01~0.025mmol/mL,并加热搅拌,用0.2mol·L-1的KOH水溶液调解至pH=4.5~5.5,得到混合物水溶液;
(2)用滤纸将上述装有混合物水溶液的烧杯封口,然后置于鼓风干燥箱中,温度控制在25~45℃,3~5天后析出无色块状晶体;
(3)将无色块状晶体取出,用无水乙醇洗涤,干燥,即获得所述的橙黄色荧光材料。
3.根据权利要求2所述的橙黄色荧光材料的制备方法,其特征在于,所述参加反应的物质为化学纯。
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