Construction of a Luminescent Cadmium-Based Metal-Organic Framework for Highly Selective Discrimination of Ferric Ions.

Construction of a Luminescent Cadmium-Based Metal-Organic Framework for Highly Selective Discrimination of Ferric Ions.
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构建用于高选择性识别铁离子的发光镉基金属有机框架

DOI:
10.3390/molecules26226847
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发表时间:
2021-11-13
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Cai H
Cai H
中科院分区:
其他
文献类型:
--
作者:
Xu LL;Zhang QF;Wang D;Wu GW;Cai H

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荧光金属有机骨架(mof)具有可调节的孔径和官能团,具有良好的金属离子选择性识别能力,是传感器的理想材料。本文以Cd(NO3)2·4H2O和3,3 ',5,5 ' -联苯四羧酸为原料,采用溶剂热法合成了一种新型镉基MOF。CdBPTC具有三种通道类型,分别沿a、b、c轴尺寸约为8.4 × 8.3 Å、6.0 × 5.2 Å、9.7 × 8.4 Å。该MOF对铁离子有很高的选择性,对其他阳离子也有很好的抗推理能力。结果表明,当Fe3+浓度达到1.0 × 10−3 mol·L−1时,CdBPTC的荧光猝灭效率接近100%。此外,在2.0 × 10−4~7.0 × 10−4 mol·L−1浓度范围内,427 nm处的发光强度呈线性关系,可以用线性Stern-Volmer方程I0/I = 8489 [Fe3+]−0.1400定量表示,与先前报道的性能较好的材料相当。不同Fe3+浓度下CdBPTC荧光强度的变化可能与竞争性能量吸收和离子交换有关。
Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO3)2·4H2O and 3,3′,5,5′-biphenyltetracarboxylic acid by solvothermal method. CdBPTC owned three types of channels with dimensions of approximately 8.4 × 8.3 Å, 6.0 × 5.2 Å, 9.7 × 8.4 Å along a, b, and c axis, respectively. This MOF has high selectivity to ferric ions and shows excellent anti-inference ability toward many other cations. The results indicate that the fluorescence quenching efficiency of CdBPTC is close to 100% when the concentration of Fe3+ reaches 1.0 × 10−3 mol·L−1. Moreover, the luminescent intensity at 427 nm presents a linear relationship at a concentration range of 2.0 × 10−4~7.0 × 10−4 mol·L−1, which can be quantitatively expressed by the linear Stern–Volmer equation I0/I = 8489 [Fe3+] − 0.1400, which is comparable to the previously reported better-performing materials. Competitive energy absorption and ion exchange may be responsible for the variation in fluorescence intensity of CdBPTC in different Fe3+ concentrations.
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DOI: 10.1021/acs.analchem.7b05088
发表时间: 2018-02-06
影响因子: 7.4
作者:
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通讯作者: Zhao, Bin
DOI: 10.1107/s0021889811043202
发表时间: 2011-12-01
影响因子: 6.1
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DOI: 10.1007/s40820-018-0218-0
发表时间: 2018
期刊: Nano-micro letters
影响因子: 26.6
作者:
Fang X;Zong B;Mao S
通讯作者: Mao S
DOI: 10.1016/j.jssc.2017.12.033
发表时间: 2018-03-01
影响因子: 3.3
作者:
Lv, Rui;Chen, Zhihengyu;Liu, Xin
通讯作者: Liu, Xin
DOI: 10.1039/c2jm32661
发表时间: 2012-01-01
影响因子: --
作者:
Dang, Song;Ma, En;Zhang, Hongjie
通讯作者: Zhang, Hongjie