Sarjanović, Josipa; Razum, Marta; Fiser, Bela; Pavić, Luka; Pisk, Jana (2025) Exploring the Gas-Sensing Properties at Room-Temperature and Electrical Behavior of Oxalyl Dihydrazide-Derived Molybdenum Complexes. Journal of Materials Chemistry C Materials for optical and electronic devices . ISSN 2050-7526
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Abstract
This study reports the design, synthesis, characterization, and performance evaluation of novel semiconductive molybdenum coordination complexes derived from an oxalyldihydrazide-based ligand. The ligand H 4 L was synthesized through the reaction of salicylaldehyde with oxalyldihydrazide, followed by coordination with a molybdenum metal center.From methanol solution, a dinuclear complex, [Mo₂O₄(L)(MeOH)₂]•2H₂O, was isolated, while a polynuclear complex of the formula [Mo₂O₄(L)] was obtained from ethanol, acetonitrile, or acetone. The complexes were characterized using spectroscopic techniques and elemental analysis, and their thermal stabilities were assessed using thermogravimetric analysis. Density functional theory calculations were used to further assess the structural properties. The crystal and molecular structure of [Mo 2 O 4 (L)(MeOH) 2 ]•2MeOH were determined through single-crystal X-ray diffraction. Notably, thefor the detection of volatile organic compounds (VOCs), including MeOH, EtOH, PrOH, as well as H 2 O. Specifically, exposure to MeOH led to a six-order magnitude increase in conductivity, highlighting its high sensitivity. Exposure to EtOH resulted in a five-order magnitude increase, whereas exposure to PrOH led to a four-and-a-half-order magnitude increase in conductivity. Further optimization of the experimental setup enabled reproducible response cycles upon exposure of the material to methanol vapor. Moreover, the response time for MeOH detection was as low as 40 s, with the recovery time of 230 s, indicating high sensing efficiency at RT.
| Item Type: | Article | ||||||||
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| Additional Information: | Internal RBI funding scheme ZI- 2023 program (ZI5-25) through National Recovery and Resilience Plan 2021-2026 (NPOO), funded by the European Union’s NextGenerationEU program. | ||||||||
| Uncontrolled Keywords: | molybdenum complexes; impedance spectroscopy; sensors | ||||||||
| Subjects: | NATURAL SCIENCES > Physics NATURAL SCIENCES > Chemistry |
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| Divisions: | Division of Materials Chemistry | ||||||||
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| Depositing User: | Luka Pavić | ||||||||
| Date Deposited: | 10 Dec 2025 14:43 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/10320 | ||||||||
| DOI: | 10.1039/D5TC03013G |
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