Chemical Fixation of CO₂ and Other Heterogeneous Catalytic Studies by Employing a Layered Cu‐Porphyrin Prepared Through Single‐Crystal to Single‐Crystal Exchange of a Zn Analogue

Abstract

As olvothermal reaction of Zn(NO 3 ) 2

Structure and photophysical and electrochemical properties of a copper porphyrin complex with a three-dimensional framework

“…Atom Cu1 is located at the centre of the porphyrin macrocycle and displays a four-coordinated squareplanar geometry without an axial ligation and the distortion angle is 6.113 (2) . The Cu1-N bond lengths (Table 2) are comparable with those reported previously (Muratsugu et al, 2018;Dutta et al, 2018;Sengupta et al, 2016). The N-Cu1-N bond angles can be grouped either in the range 89.9 (2)-90.4 (2) , close to 90 , or in the range 175.6 (2)-175.7 (2) , close to 180 .…”

“…Among these compounds, however, copper-containing 5,10,15,20-tetrakis(pyridin-4-yl)-21H,23H-porphine coordination compounds are relatively rare. For instance, Muratsugu et al (2018) reported an Ru 12 -Cu-porphyrin complex, Dutta et al (2018) Sengupta et al (2016) reported a two-dimensional metal-organic framework (MOF) [Cu(TPyP)Cu 2 (O 2 CCH 3 ) 4 ] [TPyP is the 5,10,15,20-tetrakis(pyridin-4-yl)-21H,23H-porphine anion] and a three-dimensional MOF [Cu(TPyP)-CuCl 2 ]Á2.5TCEÁ7H 2 O (TCE is trichloroethylene).…”

Imidazo[1,2-a]pyridine A3-Coupling Catalyzed by a Cu/SiO2 Material

“…45 Recently, copper and porphyrin-MOF derivatives were successfully applied on the synthesis of imidazo[1,2-a]pyridines, however a copper solution must be periodically replaced for zinc exchange on catalyst preparation. 46 In this context the use of small amounts of copper nanoparticles where also successful, but they suffer of several steps for preparation or low stability for storage. 47,48 Superparamagnetic iron-copper nanoparticles leads to higher yields of imidazo[1,2-a]pyridines (75-95%), but the catalyst preparation involves the use of very high range of temperature (500-900 ºC) and they also require the use of euthetic mixture citric acid-dimethyl urea which favors the imine intermediate formation.…”

Encapsulation of Silver Nanoparticles in an Amine‐Functionalized Porphyrin Metal–Organic Framework and Its Use as a Heterogeneous Catalyst for CO2 Fixation under Atmospheric Pressure

“…Carboxylation reactions, in general, were carried out under homogeneous catalytic conditions; this would prevent recovery of the catalyst. In our efforts towards fixation of CO 2 into useful products, we have recently employed a MOF compound synthesized from tetra(4‐pyridyl)porphyrin (H 2 TPyP) and 4,4′‐oxybis(benzoic acid) (H 2 OBA), which catalyzes and converts CO 2 into cyclic carbonates . In a continuation of this work, we have now attempted CO 2 fixation by employing a silver‐nanoparticle‐loaded porphyrin‐based MOF, [Zn 3 (C 40 H 24 N 8 )(C 20 H 8 N 2 O 4 ) 2 (DEF) 2 ](DEF) 3 ( 1 ; DEF= N , N ‐diethylformamide).…”

“…In our efforts towards fixation of CO 2 into useful products, we have recently employed aM OF compound synthesized from tetra(4-pyridyl)porphyrin (H 2 TPyP) and 4,4'-oxybis(benzoic acid) (H 2 OBA), which catalyzesa nd converts CO 2 into cyclic carbonates. [15] In ac ontinuation of this work, we have now at- [16] The porphyrin support, 1,w as prepared by means of as olvothermal method by employing Zn(NO 3 ) 2 ·6H 2 O, H 2 TPyP,a nd 1,2-diamino-3,6-bis(4-carboxyphenyl)benzene as al inker.T he free amine groups, present in the linker,a re attractive for the anchoring of silver nanoparticles. The metal-loaded MOF material( Ag@1)w as employed for the carboxylation of at erminal alkyneb ye mploying gaseous CO 2 under 1atm pressure.…”