Study on Optical Properties of Cu-MOF Nano Metal Oxide Composites

Challa, Malathi; Ambika, M.R.; Usharani, S.R.; Yallur, Basappa C.; Adimule, Vinayak

doi:10.4028/p-266wz9

Cited by 4 publications

(3 citation statements)

References 56 publications

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“…Nevertheless, MOFs are also used as hybrid heterogenous catalyst for numerous oxidation [57][58], reduction [59] and coupling reactions [60]. The most common metal ions used in MOFs are Zinc, Copper [61][62], iron [63], Zirconium [64] , titanium [65], Scandium [66], vanadium [67], chromium [68], nickel [69], manganese [70], samarium [71], cobalt [72], while the common organic linkers can be classified into aromatic acids such as terephthalic acid [73], benzoic acid [74], trimeric acid [75], or 2methylimidazole, benzene-1,3,5-tricarboxylic [76] acid, [1,1'-biphenyl]-4,4'-dicarboxylic acid,[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid [ 77], 4,4'-(ethyne-1,2-diyl)dibenzoic acid,pyrene-2,7-dicarboxylic acid [78] have been excessively used as organic linkers [79]. MOFs are synthesized [80][81] by Conventional electric (CE) heating, microwave (MW) heating, electrochemistry (EC), mechanochemistry (MC), and ultrasonic (US) methods and good crystallinity, porous size, control over morphology and thermally stable MOF are being obtained using this method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Optical and Luminescence Properties of Copper Based Metal Organic Frame Works

Pai¹,

Adimule²,

Yallur

et al. 2023

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Herein, we report synthesis of two new copper metal organic frameworks. The organic linkers were terephthalic acid with 6-Dihydroimidazo[2,1-b]thiazole-2-carbaldehyde and terephthalic acid with 3-benzothiazol-2-yl-malonaldehyde used in the copper nano metal organic framework (MOF). Both the Cu-MOF’s were characterized by XRD, UV-vis spectroscopy and FTIR. XRD crystallographic studies revealed the presence of copper metal at 2θ at 18.4°. Tauc plots were simulated to calculate the band gap of both Cu-MOF’s and result indicated the band gap energy of Cu-MOF 1 at 3.31 eV and for Cu-MOF 2 was at 3.57 eV. The UV-Visible absorption studies indicated two bands for Cu-MOF 1 and Cu-MOF 2 at 326 nm. However, the second band in Cu MOF 1 at 509 nm was slightly shifted to higher wavelength at 516 nm in Cu-MOF 2 due to the extension of π-π* transition. The photoluminescent properties of both Cu-MOF’s indicated a strong band at 505 nm. Thus, the optical properties of both the Cu-MOF’s infers that these can be a promising semiconductor material for various electronic applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Optical and Luminescence Properties of Copper Based Metal Organic Frame Works

Pai¹,

Adimule²,

Yallur

et al. 2023

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“…In recent years, the application of hybrid materials such as organic metal frame works have also resulted in significant contribution towards increasing the optoelectronic properties of the material [40]. Various organic linkers containing functional groups such as carboxylic acid, amine functionality, sulfur are used along with the transition metals to fine tune the required optical energy for the requisite applications [41][42]. Similarly, various metals containing iron, copper, cobalt, chromium, cadmium, vanadium, zinc, nickel, manganese, scandium, etc., along with organic framework have been reported [44].…”

Section: Introductionmentioning

confidence: 99%

Study of Temperature Effect on the Structure and Optical Properties of RIT- 62 Cu-MOFs

Kamat

Adimule²,

Yallur³

et al. 2023

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Metal organic frameworks are the materials of today’s generation and are widely used for their various physicochemical properties. MOFs are synthesized by various methods such chemical precipitation method, solgel method, hydrothermal method etc. To attain the required optoelectronic properties of MOFs, synthetic methods play a important role. In the present work, the synthesis of Cu-MOFs was carried out at 80 °C and 120 °C. The synthesized Cu-MOFs were labeled as RIT 62-Cu-MOF-1 and RIT 62-Cu-MOF-2. Both the Cu-MOFs were characterized by FTIR, UV-visible spectra. The FESEM of both Cu-MOFs indicated that spherical particles with 120 to 200 nms. of particle size. Tauc’s method was employed to compute the band gap of both Cu-MOFs. RIT 62-Cu-MOF-1 imparted 2.67 eV while RIT 62-Cu-MOF-2 imparted average of 2.06 eV off bandgap. 2.35 eV due to ligand-metal charge transfer observed through UV-visible spectra. Further, optimization of synthetic procedures to enhance the optical properties of Cu-MOFs.

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“…Metal organic frame works (MOFs) are molecules with small organic compounds that act as linkers and are connected to the various metal clusters through co-ordination bondage leading a diversified hybrid crystalline structure with varied physical and chemical properties [37]. In recent years, MOFs have been attracted research across the multidisciplinary subjects [38,39], due to their diversified physical properties such as optical [40,41], large surface area, high porosity, geometrically welldesigned structures and versatility in chemical properties attained due to numerous functional groups of organic linkers [42,43]. Various heteroatoms such as oxygen, nitrogen, sulfur have been used as organic ligands [].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Optical Properties of Copper Terephthalate Metal Organic Frame Works

Nagalakshmi,

Nandeesh,

Yallur

et al. 2023

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Two new copper-based metal organic frame work (Cu-MOF21 and CU-MOF-22) was synthesized using bromo malonaldehyde and terephthalic an amino terephthalic acid. They synthesized CU-MOFs were characterized by FT-IR, UV-Visible spectroscopy. The XRD diffraction pattern indicated 2 θ at 17.3° and 26.8°. The Tauc’s method was employed to calculate the band gap of Cu-MOFs and was found that Cu-MOFS-21 exhibited 3.14 eV and Cu-MOF-22 with average bandgap energy at 3.61 eV attributed to the ligand-metal charge transfer. The results indicate that both Cu-MOFs can be further modified by suitable dopants to enhance the conductivity and reduce the band gap energy. Keywords: Metal organic frameworks, Copper metal, Bandgap energy, photoluminescence,

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Study on Optical Properties of Cu-MOF Nano Metal Oxide Composites

Cited by 4 publications

References 56 publications

Synthesis, Characterization, Optical and Luminescence Properties of Copper Based Metal Organic Frame Works

Synthesis, Characterization, Optical and Luminescence Properties of Copper Based Metal Organic Frame Works

Study of Temperature Effect on the Structure and Optical Properties of RIT- 62 Cu-MOFs

Synthesis and Optical Properties of Copper Terephthalate Metal Organic Frame Works

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