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Barrio J, Li J, Shalom M. Carbon Nitrides from Supramolecular Crystals: From Single Atoms to Heterojunctions and Advanced Photoelectrodes. Chemistry 2023; 29:e202302377. [PMID: 37605638 DOI: 10.1002/chem.202302377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 08/23/2023]
Abstract
Carbon nitride materials (CN) have become one of the most studied photocatalysts within the last 15 years. While CN absorbs visible light, its low porosity and fast electron-hole recombination hinder its photoelectric performance and have motivated the research in the modification of its physical and chemical properties (such as energy band structure, porosity, or chemical composition) by different means. In this Concept we review the utilization of supramolecular crystals as CN precursors to tailor its properties. We elaborate on the features needed in a supramolecular crystal to serve as CN precursor, we delve on the influence of metal-free crystals in the morphology and porosity of the resulting materials and then discuss the formation of single atoms and heterojunctions when employing a metal-organic crystal. We finally discuss the performance of CN photoanodes derived from crystals and highlight the current standing challenges in the field.
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Affiliation(s)
- Jesús Barrio
- Department of Chemical Engineering, Imperial College London, London, SW72AZ, England, UK
| | - Junyi Li
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
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2
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Chhetri A, Karthick K, Karmakar A, Kundu S, Mitra J. Melamine-Based Hydrogen-bonded Systems as Organoelectrocatalysts for Water Oxidation Reaction. CHEMSUSCHEM 2023; 16:e202300220. [PMID: 36852710 DOI: 10.1002/cssc.202300220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 02/22/2023] [Indexed: 06/10/2023]
Abstract
Applications of small organic molecules and hydrogen-bonded aggregates, instead of traditional transition-metal-based electrocatalysts, are gaining momentum for addressing the issue of low-cost generation of H2 to power a sustainable environment. Such systems offer the possibility to integrate desired functional moieties with predictive structural repetition for modulating their properties. Despite these advantages, hydrogen-bonded organic systems have largely remained unexplored, especially as electrocatalysts. Melamine and adipic acid-based hydrogen-bonded organic ionic (BMA) and co-crystal systems developed under varying temperatures are explored as electrocatalysts for water oxidation reaction (WOR). These systems are easily modifiable with precisely designed molecular architecture and judiciously positioned nitrogen atoms. Combined effect of charge-assisted hydrogen bonding stabilizes the ionic BMA system under corrosive alkaline conditions and augments its remarkable electrocatalytic WOR activity, achieving a current density of 10 mA cm-2 at an overpotential of 387 mV and Faradaic efficiency ∼94.5 %. The enhanced electrocatalytic ability of BMA is attributed to its hydrophilic nature, unique molecular composition with complementary hydrogen-bonded motifs and a high density of positively charged nitrogen atoms on the surface, that facilitates electrostatic interactions and accelerate charge and mass transport processes culminating in a turnover frequency of ∼0.024 s-1 . This work validates the potential of hydrogen-bonded molecular organo-electrocatalysts towards WOR.
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Affiliation(s)
- Ashis Chhetri
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, 364002, Bhavnagar, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, 201002, Ghaziabad, U.P., India
- Centre for Advanced Materials & Industrial Chemistry, RMIT University, 3000, Melbourne, VIC, Australia
| | - Kannimuthu Karthick
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, 201002, Ghaziabad, U.P., India
- Electrochemical Process Engineering (EPE) Division, CSIR-CECRI, 630003, Karaikudi, Tamil Nadu, India
| | - Arun Karmakar
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, 201002, Ghaziabad, U.P., India
- Electrochemical Process Engineering (EPE) Division, CSIR-CECRI, 630003, Karaikudi, Tamil Nadu, India
| | - Subrata Kundu
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, 201002, Ghaziabad, U.P., India
- Electrochemical Process Engineering (EPE) Division, CSIR-CECRI, 630003, Karaikudi, Tamil Nadu, India
| | - Joyee Mitra
- Inorganic Materials & Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, 364002, Bhavnagar, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, 201002, Ghaziabad, U.P., India
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Christabel M, Zhou R, Yan T, Zhang H, Ding L, Wang R. Crystal structure of the cocrystal 2,4,6-triamino-1,3,5-triazine – 1 H-isoindole-1,3(2 H)-dione – methanol (1/1/1), C 12H 15N 7O 3. Z KRIST-NEW CRYST ST 2022. [DOI: 10.1515/ncrs-2022-0261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C12H15N7O3, P21/c (no. 14), a = 7.1782(3) Å, b = 16.6800(6) Å, c = 12.1070(5) Å, β = 92.030(2)°, V = 1448.69(10) Å3, Z = 4, Rgt
(F) = 0.0449, wRref
(F
2) = 0.1220, T = 296(2) K.
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Affiliation(s)
- Madeline Christabel
- Department of Chemistry , Xi’an Jiaotong-Liverpool University , 111 Ren’ai Road , Suzhou , Jiangsu 215123 , P.R. China
| | - Ruixue Zhou
- Wisdom Lake Academy of Pharmacy, Xi’an Jiaotong-Liverpool University , 111 Ren’ai Road , Suzhou , Jiangsu 215123 , P.R. China
| | - Tianhao Yan
- Department of Chemistry , Xi’an Jiaotong-Liverpool University , 111 Ren’ai Road , Suzhou , Jiangsu 215123 , P.R. China
| | - Haifei Zhang
- Department of Chemistry , University of Liverpool , Crown Street , Liverpool , L69 7ZD , UK
| | - Lifeng Ding
- Department of Chemistry , Xi’an Jiaotong-Liverpool University , 111 Ren’ai Road , Suzhou , Jiangsu 215123 , P.R. China
| | - Ruiyao Wang
- Wisdom Lake Academy of Pharmacy, Xi’an Jiaotong-Liverpool University , 111 Ren’ai Road , Suzhou , Jiangsu 215123 , P.R. China
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Samanta J, Dorn RW, Zhang W, Jiang X, Zhang M, Staples RJ, Rossini AJ, Ke C. An ultra-dynamic anion-cluster-based organic framework. Chem 2022. [DOI: 10.1016/j.chempr.2021.11.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Wzgarda-Raj K, Rybarczyk-Pirek A, Wojtulewski S, Palusiak M. Novel melamine – salicylic salt solvates and co-crystals; an analysis of the energetic parameters of the intermolecular hydrogen bonds stabilizing the crystal structure. CrystEngComm 2022. [DOI: 10.1039/d2ce00684g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel crystal structures based on melamine and salicylic acid, with either water (I) (4:3:8 molecular ratio) or ethanol (II) (2:2:1 molecular ratio), can be treated as salt solvates. In...
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Kallenbach P, Bayat E, Ströbele M, Romao CP, Meyer HJ. Tricopper Melaminate, a Metal-Organic Framework Containing Dehydrogenated Melamine and Cu-Cu Bonding. Inorg Chem 2021; 60:16303-16307. [PMID: 34665613 DOI: 10.1021/acs.inorgchem.1c02145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Crystals of Cu3(C3N6H3) are formed by a solid-state reaction of CuCl with melamine to form a layered framework structure with open pores running along the hexagonal axis direction of the P6/mcc structure. The compound contains the hitherto unknown (C3N6H3)3- ion, assigned as melaminate. Bonding interactions within and between Cu-Cu dumbbells, which connect melaminate ions into layers, are analyzed by density functional theory calculations of the electron localization function and directional Young's modulus. Band structure calculations reveal the material to be a semiconductor with a band gap on the order of 2 eV.
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Affiliation(s)
- Paula Kallenbach
- Section for Solid State and Theoretical Inorganic Chemistry Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Elaheh Bayat
- Section for Solid State and Theoretical Inorganic Chemistry Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Markus Ströbele
- Section for Solid State and Theoretical Inorganic Chemistry Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Carl P Romao
- Section for Solid State and Theoretical Inorganic Chemistry Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Hans-Jürgen Meyer
- Section for Solid State and Theoretical Inorganic Chemistry Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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Naphthazarin Derivatives in the Light of Intra- and Intermolecular Forces. Molecules 2021; 26:molecules26185642. [PMID: 34577113 PMCID: PMC8468954 DOI: 10.3390/molecules26185642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/04/2021] [Accepted: 09/14/2021] [Indexed: 11/17/2022] Open
Abstract
Our long-term investigations have been devoted the characterization of intramolecular hydrogen bonds in cyclic compounds. Our previous work covers naphthazarin, the parent compound of two systems discussed in the current work: 2,3-dimethylnaphthazarin (1) and 2,3-dimethoxy-6-methylnaphthazarin (2). Intramolecular hydrogen bonds and substituent effects in these compounds were analyzed on the basis of Density Functional Theory (DFT), Møller-Plesset second-order perturbation theory (MP2), Coupled Clusters with Singles and Doubles (CCSD) and Car-Parrinello Molecular Dynamics (CPMD). The simulations were carried out in the gas and crystalline phases. The nuclear quantum effects were incorporated a posteriori using the snapshots taken from ab initio trajectories. Further, they were used to solve a vibrational Schrödinger equation. The proton reaction path was studied using B3LYP, ωB97XD and PBE functionals with a 6-311++G(2d,2p) basis set. Two energy minima (deep and shallow) were found, indicating that the proton transfer phenomena could occur in the electronic ground state. Next, the electronic structure and topology were examined in the molecular and proton transferred (PT) forms. The Atoms In Molecules (AIM) theory was employed for this purpose. It was found that the hydrogen bond is stronger in the proton transferred (PT) forms. In order to estimate the dimers' stabilization and forces responsible for it, the Symmetry-Adapted Perturbation Theory (SAPT) was applied. The energy decomposition revealed that dispersion is the primary factor stabilizing the dimeric forms and crystal structure of both compounds. The CPMD results showed that the proton transfer phenomena occurred in both studied compounds, as well as in both phases. In the case of compound 2, the proton transfer events are more frequent in the solid state, indicating an influence of the environmental effects on the bridged proton dynamics. Finally, the vibrational signatures were computed for both compounds using the CPMD trajectories. The Fourier transformation of the autocorrelation function of atomic velocity was applied to obtain the power spectra. The IR spectra show very broad absorption regions between 700 cm-1-1700 cm-1 and 2300 cm-1-3400 cm-1 in the gas phase and 600 cm-1-1800 cm-1 and 2200 cm-1-3400 cm-1 in the solid state for compound 1. The absorption regions for compound 2 were found as follows: 700 cm-1-1700 cm-1 and 2300 cm-1-3300 cm-1 for the gas phase and one broad absorption region in the solid state between 700 cm-1 and 3100 cm-1. The obtained spectroscopic features confirmed a strong mobility of the bridged protons. The inclusion of nuclear quantum effects showed a stronger delocalization of the bridged protons.
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8
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Sebghati M, Tarahhomi A, Bozorgvar MS, Dumitrescu DG, van der Lee A. Coordination versus hydrogen bonds in the structures of different tris(pyridin-2-yl)phosphoric triamide derivatives. RSC Adv 2021; 11:8178-8197. [PMID: 35423343 PMCID: PMC8695197 DOI: 10.1039/d0ra10539b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/01/2021] [Indexed: 01/22/2023] Open
Abstract
The crystalline forms of tris(pyridin-2-yl)phosphoric triamide, OP[NH-2Py]3 were investigated using single crystal X-ray diffraction, both as a metal complex [Co{(O)P[NH-2Py]2[NH-2PyH]}2]Cl3, compound 1, and as the purely organic pseudopolymorphs, the pure/anhydrate OP[NH-2Py]3, 2, monohydrate 2OP[NH-2Py]3·H2O, 3 and solvate 2OP[NH-2Py]3·2DMF·H2O, 4, respectively. An improved model of the metal organic framework (MOF) structure of Cu(ii)O6 {[Cu(OCHO)3][(CH3)2NH2]} n , 5 is also reported. Compound 1 is the first example of a discrete chelate phosphoric triamide (PT) complex with an [N]3P(O)-based backbone which in the PT compound acts as a flexible tridentate ligand. The structures 1, 3 and 4 crystallize in the monoclinic space group P21/n, while the anhydrous form 2 crystallizes in the R3̄ trigonal space group. 5 which was obtained as a byproduct of the synthesis process of coordination compounds of OP[NH-2Py]3, crystallizes in the monoclinic space group I2/c. Hydrogen bonding pattern analysis for the different solid state forms of OP[NH-2Py]3 (2-4) shows a 2D sheet of the N-H⋯N linked molecules for 2, and a 1D chain and a ten-membered ring motif, both formed via the hydrogen bonds N-H⋯O, N-H⋯N and O-H⋯O, for 3 and 4, respectively. Of note is the unusual absence of the expected hydrogen bond interaction N-H⋯O[double bond, length as m-dash]P of PT compounds and also a lack of any significant π interactions in structure 2. The role of the solvent/hydrate and substituent (aminopyridine) in the formation of the expected hydrogen bond interactions in the studied solid state forms is also investigated. For these structures, crystal packing analysis using 3D Hirshfeld surface (HS), 2D fingerprint plot (FP) and enrichment ratio (E) calculations confirm a competition between the pyridinyl nitrogen and phosphoryl oxygen atoms as H-bond acceptors to construct the N-H⋯N or N-H⋯O contacts. Moreover, the significant differences between the anhydrous form of OP[NH-2Py]3, 2, and the monohydrate and solvate forms, 3 and 4, can be correlated to the pseudo-infinite (in 2) versus finite values (in 3 and 4) for the upper values of d e and d i on the related full FPs.
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Affiliation(s)
- Marjan Sebghati
- Department of Chemistry, Semnan University Semnan 35351-19111 Iran +98 23 33654110 +98 23 31533199
| | - Atekeh Tarahhomi
- Department of Chemistry, Semnan University Semnan 35351-19111 Iran +98 23 33654110 +98 23 31533199
| | - Marjan Sadat Bozorgvar
- Department of Chemistry, Semnan University Semnan 35351-19111 Iran +98 23 33654110 +98 23 31533199
| | - Dan G Dumitrescu
- XRD2 beamline, Elettra - Sincrotrone Trieste S.C.p.A. 34149 Basovizza Trieste Italy
| | - Arie van der Lee
- Institut Européen des Membranes, IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugéne Bataillon 34095 Montpellier cedex 5 France
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9
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Huang J, Wang H, Yu H, Zhang Q, Cao Y, Peng F. Oxygen Doping in Graphitic Carbon Nitride for Enhanced Photocatalytic Hydrogen Evolution. CHEMSUSCHEM 2020; 13:5041-5049. [PMID: 32662925 DOI: 10.1002/cssc.202001317] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/30/2020] [Indexed: 06/11/2023]
Abstract
The incorporation of oxygenic groups could remarkably enhance the light absorption and charge separation of graphitic carbon nitride (g-C3 N4 ). The intrinsic role of oxygenic species on photocatalytic activity in g-C3 N4 has been intensively studied, but it is still not fully explored. Herein, the essential relationships between oxygenic functionalities and the catalytic performance are revealed. Results demonstrate that C-O-C functionality as an electron trap could help to increase the resistance of conduction transfer (Rct ) by limiting electrons transfer in CNx. In contrast, N-C-O functionality between different tri-s-triazine unites could promote the electrons transfer, leading to a reduced Rct in CNx. The best H2 production rate (3.70 mmol h-1 g-1 , 12.76-fold higher than that of CN) is obtained over CN3, because of the highest N-C-O ratio (rN-C-O ). The apparent quantum efficiency (AQE) of CN3 at 405 nm, 420 nm, 450 nm, 500 nm and 550 nm is 33.90 %, 20.88 %, 8.25 %, 3.66 % and 1.01 %, respectively.
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Affiliation(s)
- Jiangnan Huang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Hongjuan Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Hao Yu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Qiao Zhang
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, P. R. China
| | - Yonghai Cao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China
| | - Feng Peng
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, P. R. China
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10
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Janczak J. Supramolecular solid-state architecture formed by co-crystallization of melamine and phenylacetic acid. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Boadi EA, Deems NJ, Raub CB, Bandyopadhyay BC. Matting Calcium Crystals by Melamine Improves Stabilization and Prevents Dissolution. CRYSTAL GROWTH & DESIGN 2019; 19:6636-6648. [PMID: 31749663 PMCID: PMC6867689 DOI: 10.1021/acs.cgd.9b01036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Melamine induces calcium phosphate (CaP) and calcium oxalate (CaOx) crystal formation; however, the physicochemical mechanism is not clear. Recently, we found that melamine has a discriminatory effect on CaP, CaOx, and CaP + CaOx (Mixed) crystal dissolution. Thus, to delineate the mechanism, we examined crystal interactions through birefringence analysis and found that CaP becomes increasingly birefringent when bound to melamine, while the birefringence of CaOx decreases when it forms CaOx-melamine cocrystals. We also confirmed the feasibility of such melamine-CaP/CaOx co-crystallization at the nanomicromolar range. Interestingly, ammeline, which is a similar triazine, did not accelerate CaP/CaOx/Mixed crystal formation and growth, indicating the specificity of crystal interaction by melamine. Furthermore, melamine stabilizes the CaP/CaOx/Mixed crystals when exposed to a crystal inhibitor (etidronic acid) or dissolution agents (citrate analogues), while it induces crystal growth by increasing crystal retention, suggesting melamine's interference with conventional dissolution remedies. Morphological and elemental analysis of melamine-CaP/CaOx/Mixed co-crystals using scanning electron microscopy further revealed that melamine harbors such crystals by creating a nucleation site. Finally, we confirmed the physiological relevance of melamine exposure using artificial urine to show the induction, stabilization, and retention of mixed crystals in the presence of crystal-inhibitor/dissolution agent and thus established potential causes of recurrence of kidney stones.
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Affiliation(s)
- Eugenia Awuah Boadi
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, 50 Irving Street, NW, Washington, District of Columbia 20422, United States
| | - Nikolaus J. Deems
- The Vitreous State Laboratory, The Catholic University of America, 620 Michigan Avenue NE, Washington, District of Columbia 20064, United States
| | - Christopher B. Raub
- Department of Biomedical Engineering, The Catholic University of America, 620 Michigan Avenue NE, Washington, District of Columbia 20064, United States
| | - Bidhan C. Bandyopadhyay
- Calcium Signaling Laboratory, Research Service, Veterans Affairs Medical Center, 50 Irving Street, NW, Washington, District of Columbia 20422, United States
- Department of Biomedical Engineering, The Catholic University of America, 620 Michigan Avenue NE, Washington, District of Columbia 20064, United States
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University, Washington, District of Columbia 20037, United States
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Boosting Hydrogen Production from Formic Acid over Pd Catalysts by Deposition of N-Containing Precursors on the Carbon Support. ENERGIES 2019. [DOI: 10.3390/en12203885] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Formic acid is a promising liquid organic hydrogen carrier (LOHC) since it has relatively high hydrogen content (4.4 wt%), low inflammability, low toxicity and can be obtained from biomass or from CO2. The aim of the present research was the creation of efficient 1 wt% Pd catalysts supported on mesoporous graphitic carbon (Sibunit) for the hydrogen production from gas-phase formic acid. For this purpose, the carbon support was modified by pyrolysis of deposited precursors containing pyridinic nitrogen such as melamine (Mel), 2,2′-bipyridine (Bpy) or 1,10-phenanthroline (Phen) at 673 K. The following activity trend of the catalysts Pd/Mel/C > Pd/C ~ Pd/Bpy/C > Pd/Phen/C was obtained. The activity of the Pd/Mel/C catalyst was by a factor of 4 higher than the activity of the Pd/C catalyst at about 373 K and the apparent activation energy was significantly lower than those for the other catalysts (32 vs. 42–46 kJ/mol). The high activity of the melamine-based samples was explained by a high dispersion of Pd nanoparticles (~2 nm, HRTEM) and their strong electron-deficient character (XPS) provided by interaction of Pd with pyridinic nitrogen species of the support. The presented results can be used for the development of supported Pd catalysts for hydrogen production from different liquid organic hydrogen carriers.
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Sacalis C, Morar C, Lameiras P, Lupan A, Silaghi-Dumitrescu R, Bende A, Katona G, Porumb D, Harakat D, Gál E, Darabantu M. Design, synthesis and structure of novel dendritic G-2 melamines comprising piperidine motifs as key linkers and 4-(n-octyloxy)aniline as a peripheral unit. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Kessler FK, Schuhbeck AM, Schnick W. Melamium Thiocyanate Melam, a Melamium Salt with Disordered Anion Sites. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201900054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fabian K. Kessler
- Department of Chemistry; Chair in Inorganic Solid-State Chemistry; University of Munich (LMU); Butenandtstraße 5-13 81377 Munich Germany
| | - Alexander M. Schuhbeck
- Department of Chemistry; Chair in Inorganic Solid-State Chemistry; University of Munich (LMU); Butenandtstraße 5-13 81377 Munich Germany
| | - Wolfgang Schnick
- Department of Chemistry; Chair in Inorganic Solid-State Chemistry; University of Munich (LMU); Butenandtstraße 5-13 81377 Munich Germany
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Gołdyn M, Larowska D, Nowak W, Bartoszak-Adamska E. Synthon hierarchy in theobromine cocrystals with hydroxybenzoic acids as coformers. CrystEngComm 2019. [DOI: 10.1039/c9ce01195a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cocrystals, solids composed of molecular and/or ionic compounds connected by noncovalent interactions, are objects of interest in crystal engineering. Theobromine, as an active pharmaceutical ingredient, was used in cocrystallization with dihydroxybenzoic acids.
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Affiliation(s)
- Mateusz Gołdyn
- Faculty of Chemistry
- Adam Mickiewicz University
- 61-614 Poznań
- Poland
| | - Daria Larowska
- Faculty of Chemistry
- Adam Mickiewicz University
- 61-614 Poznań
- Poland
| | - Weronika Nowak
- Faculty of Chemistry
- Adam Mickiewicz University
- 61-614 Poznań
- Poland
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Sadeghi M, Arabi Shamsabadi A, Ronasi A, Isfahani AP, Dinari M, Soroush M. Engineering the dispersion of nanoparticles in polyurethane membranes to control membrane physical and transport properties. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.08.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Feringán B, Folcia CL, Termine R, Golemme A, Granadino-Roldán JM, Navarro A, Serrano JL, Giménez R, Sierra T. Inspecting the Electronic Architecture and Semiconducting Properties of a Rosette-Like Supramolecular Columnar Liquid Crystal. Chemistry 2018; 24:17459-17463. [PMID: 30238538 DOI: 10.1002/chem.201804748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Indexed: 11/10/2022]
Abstract
Computational and experimental studies unravel the structural and electronic properties of a novel supramolecular liquid crystal built through a hierarchical assembly process resulting in an H-bonded melamine rosette decorated with peripheral triphenylenes. The six-fold symmetry of the mesogen facilitates the formation of a highly organized hexagonal columnar mesophase stable at room temperature. X-ray diffraction and electron density maps confirm additional intra- and intercolumn segregation of functional subunits, and this paves the way for 1D charge transport. Indeed, hole mobility has been measured and found to be higher than for related mesogens. DFT calculations of HOMO and LUMO levels and parameters such as reorganization energy and transfer integral of the rosette structure have been achieved, and not only validate the columnar organization but also establish the way it translates into a favorable electronic architecture and molecular orbital interactions to promote charge carrier mobility.
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Affiliation(s)
- Beatriz Feringán
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC., 50009, Zaragoza, Spain
| | - César L Folcia
- Departamento de Física de la Materia Condensada, Facultad de Ciencia y Tecnología, UPV/EHU, 48080, Bilbao, Spain
| | - Roberto Termine
- LASCAMM CR-INSTM, CNR-NANOTEC Lab LiCryL, Dipartimento di Fisica, Università della Calabria, 87036, Rende, Italy
| | - Attilio Golemme
- LASCAMM CR-INSTM, CNR-NANOTEC Lab LiCryL, Dipartimento di Fisica, Università della Calabria, 87036, Rende, Italy
| | - José M Granadino-Roldán
- Departamento de Química Física y Analítica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus Las Lagunillas, 23071, Jaén, Spain
| | - Amparo Navarro
- Departamento de Química Física y Analítica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus Las Lagunillas, 23071, Jaén, Spain
| | - José Luis Serrano
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Nanociencia de Aragón (INA)., Universidad de Zaragoza., 50018, Zaragoza, Spain
| | - Raquel Giménez
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC., 50009, Zaragoza, Spain
| | - Teresa Sierra
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC., 50009, Zaragoza, Spain
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18
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Chattaraj KG, Paul S. Understanding of Structure and Thermodynamics of Melamine Association in Aqueous Solution from a Unified Theoretical and Experimental Approach. J Chem Inf Model 2018; 58:1610-1624. [PMID: 30040417 DOI: 10.1021/acs.jcim.8b00231] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aggregation propensity of melamine molecules in aqueous solutions in a range of melamine concentrations is investigated by means of a combination of theoretical and experimental approaches. It is observed that the hydrogen bonding interactions of sp3 nitrogen atoms of one melamine with sp2 nitrogen atoms of another melamine play a major role in the melamine association. This finding is complemented by the observed favorable electrostatic energies between melamine molecules. The estimation of the orientational probability of melamine aromatic ring rules out any role of π-π interaction in melamine association. Further, the quantum chemical calculations suggest that a melamine molecule prefers to bind with another like molecule with a dihedral angle ranging from 36° to 46°. We have also determined the dimer existence autocorrelation functions to investigate the melamine-dimer stability with time in aqueous solution. Our results are well validated by the experimental findings (Chapman, R. P.; Averell, P. R.; Harris, R. R. Solubility of Melamine in Water. Ind. Eng. Chem. 1943, 35, 137-138. Ahromi, A. J.; Moosheimer, U. Oxygen Barrier Coatings Based on Supramolecular Assembly of Melamine. Macromolecules 2000, 33, 7582-7587. Yang, C.; Liu. Y. Studying on the Steady-State and Time-Resolved Fluorescence Characteristics of Melamine. Spectrochim. Acta A 2010, 75, 1329-1332. Mircescu, N. E.; Oltean, M.; Chis, V.; Leopold, N. FTIR, FT-Raman, SERS and DFT study on Melamine. Vib. Spectrosc. 2012, 62, 165-171. Makowski. S. J.; Lacher. M.; Schnick. W. Supramolecular Hydrogenbonded Structures between Melamine and N-Heterocycles. J. Mol. Struct. 2012, 1013, 19-25. Li, Z.; Chen, G.; Xu, Y.; Wang, X.; Wang, Z. Study of the Structural and Spectral Characteristics of C3N3(NH2)3(n = 1-4) Clusters. J. Phys. Chem. A 2013, 117, 12511-12518. Li, P.; Arman, D. H.; Wang, H.; Weng, L.; Alfooty, K.; Angawi, R. F.; Chen. B. Solvent Dependent Structures of Melamine: Porous or Non-porous. Cryst. Growth Des. 2015, 15, 1871-1875. Chen, J.; Lei, X.; Peng, B. Study on the Fluorescence Spectra of Melamine in Pure Milk. J. Opt. 2017, 46, 183-186.). Moreover, the thermodynamics of melamine association reveals that the association process is essentially driven by enthalpy, and this enthalpy-driven phenomenon is also confirmed by the experimental isothermal titration calorimetry measurements.
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Affiliation(s)
| | - Sandip Paul
- Department of Chemistry , Indian Institute of Technology , Guwahati , Assam , India 781039
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19
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Spiteri L, Baisch U, Vella-Zarb L. Correlations and statistical analysis of solvent molecule hydrogen bonding – a case study of dimethyl sulfoxide (DMSO). CrystEngComm 2018. [DOI: 10.1039/c7ce02206a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A statistical study of the correlation between predicted solubility of DMSO solvates and hydrogen bonds between solvent and host molecules.
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Affiliation(s)
- L. Spiteri
- Department of Chemistry
- University of Malta
- Msida
- Malta
| | - U. Baisch
- Department of Chemistry
- University of Malta
- Msida
- Malta
- School of Chemistry
| | - L. Vella-Zarb
- Department of Chemistry
- University of Malta
- Msida
- Malta
- School of Chemistry
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20
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Borovina M, Kodrin I, Đaković M. Testing the limits of halogen bonding in coordination chemistry. CrystEngComm 2018. [DOI: 10.1039/c7ce01989k] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To test the limit of halogen bonds fine-tuning of electron density was performedviaintroduction of heteroatoms and metal cations.
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Affiliation(s)
- Mladen Borovina
- Department of Chemistry
- Faculty of Science
- University of Zagreb
- 10000 Zagreb
- Croatia
| | - Ivan Kodrin
- Department of Chemistry
- Faculty of Science
- University of Zagreb
- 10000 Zagreb
- Croatia
| | - Marijana Đaković
- Department of Chemistry
- Faculty of Science
- University of Zagreb
- 10000 Zagreb
- Croatia
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21
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Mitra M, Hossain A, Manna P, Choudhury SR, Kaenket S, Helliwell M, Bauzá A, Frontera A, Mukhopadhyay S. Melamine-mediated self-assembly of a Cu(II)–methylmalonate complex assisted by π+–π+ and anti-electrostatic H-bonding interactions. J COORD CHEM 2017. [DOI: 10.1080/00958972.2016.1277709] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Monojit Mitra
- Department of Chemistry, Jadavpur University, Kolkata, India
| | - Anowar Hossain
- Department of Chemistry, Jadavpur University, Kolkata, India
| | | | | | - Surasak Kaenket
- School of Chemistry, The University of Manchester, Manchester, UK
| | | | - Antonio Bauzá
- Departament de Química, Universitat de les Illes Balears, Palma (Baleares), Spain
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, Palma (Baleares), Spain
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22
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Deacon GB, Forsyth CM, Greenhill NB, Junk PC. Recurrent supramolecular scenarios within complex 3-D hydrogen bond networks derived from organic ammonium salts of (4-amino-1-hydroxybutylidine)-1,1-bisphosphonic acid. CrystEngComm 2017. [DOI: 10.1039/c7ce01034f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Reactions of (4-amino-1-hydroxybutylidine)-1,1-bisphosphonic acid (LH5) with organic amines or diamines in aqueous solution yields crystalline compounds of the general formula [(RN)H]2[LH3] or [(R'N)H2][LH3].
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Affiliation(s)
- G. B. Deacon
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - C. M. Forsyth
- School of Chemistry
- Monash University
- Clayton
- Australia
| | | | - P. C. Junk
- College of Science and Engineering
- James Cook University
- Townsville
- Australia
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23
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Мuzyka K, Piletsky S, Zhikol O, Shishkina S. Theoretical quantum mechanical based studies of melamine – monomers interaction in pre-polymerisation phase. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/22243682.2015.1103664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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24
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Mirzaei M, Eshtiagh-Hosseini H, Bazargan M. Syntheses and X-ray crystal structure studies of four new coordination complexes and salts based on proton-transferred pyridine-2,6-dicarboxylic acid N-oxide. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-1965-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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