Saha Deblina, Dey Tamal, Pal Indrajit, Kundu Anupam, Das Shreyasi, Yatirajula Suresh Kumar, Rath Jnanendra, Ray Samit K, Dey Biswajit
Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India.
Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
Langmuir. 2024 Dec 17;40(50):26517-26531. doi: 10.1021/acs.langmuir.4c03383. Epub 2024 Nov 30.
The Zn(II)-supramolecular metallogel (i.e., Zn-Py) of 2,6-pyridinedicarboxylic acid was prepared through the addition of a metal source and 2,6-pyridinedicarboxylic acid as a low molecular weight gelator. The Zn-Py metallogel encapsulated ,'-dimethylformamide as gel-immobilized polar aprotic solvent media. The mechanical features of the synthesized metallogel were investigated. The thixotropic behavior of the Zn-Py metallogel was also analyzed. The microscopic feature of the metallogel was imaged through FESEM and TEM studies. The EDS pattern of the metallogel ratified the role of different gel-building chemical constituents. The stimuli responsiveness of the metallogel was also tested. The metallogel-forming mechanistic protocol was visualized through FTIR and ESI mass spectroscopic analyses. The bioeffectiveness, i.e., antimicrobial potency, of Zn-Py was also studied. The antimicrobial efficiency against both Gram +ve and Gram -ve bacteria including (MTCC 98), (MTCC 1667), (ATCC 13061), (MTCC 657), and (MTCC 96) was critically analyzed. The FESEM images of the live bacteria and damaged bacteria due to the action of the metallogel were experimentally investigated. The Zn-Py metallogel was also used to fabricate the heterojunction and Schottky-type photodetectors to show their excellent light-matter interaction and their potentiality as active material in optoelectronics. The electrical parameters of semiconductor diodes such as the p-n junction and Schottky diode fabricated by the synthesized Zn-Py metallogel were investigated. Outcomes of the experimental investigation demonstrated that the tested metallogel effectively showed p-n junction diode parameters, especially with the ideality factor (η) of 1.3 under a dark environment. This fabricated device efficiently depicted a great ON/OFF ratio of 33.4 at a reverse bias voltage of -2 V. The metal-semiconductor-metal (M-S-M) junction-type Schottky barrier diode was also fabricated using the Zn-Py metallogel where the Au/Zn-Py metallogel/Au-based device fabrication strategy was implemented.
通过添加金属源和作为低分子量凝胶剂的2,6 - 吡啶二甲酸制备了2,6 - 吡啶二甲酸的Zn(II)超分子金属凝胶（即Zn - Py）。Zn - Py金属凝胶封装了N,N'-二甲基甲酰胺作为凝胶固定的极性非质子溶剂介质。研究了合成金属凝胶的力学特性。还分析了Zn - Py金属凝胶的触变行为。通过场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）研究对金属凝胶的微观特征进行了成像。金属凝胶的能谱图（EDS）证实了不同凝胶构建化学成分的作用。还测试了金属凝胶的刺激响应性。通过傅里叶变换红外光谱（FTIR）和电喷雾电离质谱（ESI）分析可视化了金属凝胶形成的机理方案。还研究了Zn - Py的生物有效性，即抗菌效力。对包括金黄色葡萄球菌（MTCC 98）、枯草芽孢杆菌（MTCC 1667）、蜡样芽孢杆菌（ATCC 13061）、大肠杆菌（MTCC 657）和铜绿假单胞菌（MTCC 96）在内的革兰氏阳性菌和革兰氏阴性菌的抗菌效率进行了严格分析。通过实验研究了活细菌以及由于金属凝胶作用而受损细菌的FESEM图像。Zn - Py金属凝胶还用于制造异质结和肖特基型光电探测器，以展示其优异的光 - 物质相互作用以及作为光电子学中活性材料的潜力。研究了由合成的Zn - Py金属凝胶制造的半导体二极管（如p - n结和肖特基二极管）的电学参数。实验研究结果表明，测试的金属凝胶有效地显示出p - n结二极管参数，特别是在黑暗环境下理想因子（η）为1.3。该制造的器件在 - 2 V的反向偏置电压下有效地呈现出33.4的大开关比。还使用Zn - Py金属凝胶制造了金属 - 半导体 - 金属（M - S - M）结型肖特基势垒二极管，其中实施了基于金/Zn - Py金属凝胶/金的器件制造策略。
