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Mellado M, Espinoza L, Madrid A, Mella J, Chávez-Weisser E, Diaz K, Cuellar M. Design, synthesis, antifungal activity, and structure-activity relationship studies of chalcones and hybrid dihydrochromane-chalcones. Mol Divers 2019; 24:603-615. [PMID: 31161394 DOI: 10.1007/s11030-019-09967-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 05/25/2019] [Indexed: 12/30/2022]
Abstract
A series of ten chalcones (7a-j) and five new dihydrochromane-chalcone hybrids (7k-o) were synthesized and identified using spectroscopic techniques (IR, NMR, and MS). All compounds were evaluated in vitro against the B. cinerea and M. fructicola phytopathogens that affect a wide range of crops of commercial interest. All compounds were tested against both phytopathogens using the mycelial growth inhibition test, and it was found that two and five compounds had similar activity to that of the positive control for B. cinerea (7a = 43.9, 7c = 45.5, and Captan®= 24.8 µg/mL) and M. fructicola (7a = 48.5, 7d = 78.2, 7e = 56.1, 7f = 51.8, 7n = 63.2, and Mystic®= 21.6 µg/mL), respectively. To understand the key chalcone structural features for the antifungal activity on B. cinerea and M. fructicola, we developed structure-activity models with good statistical values (r2 and q2 higher than 0.8). For B. cinerea, the hydrogen bonding donor and acceptor and the atomic charge on C5 modulate the mycelial growth inhibition activity. In contrast, dipole moment and atomic charge on C1' and the carbonyl carbon modify the inhibition activity for M. fructicola. These results allow the design of other compounds with activities superior to those of the compounds obtained in this study.
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Affiliation(s)
- Marco Mellado
- Facultad de Ciencias, Instituto de Química, Pontificia Universidad Católica de Valparaíso, Av. Universidad #330, Curauma, Valparaiso, Chile.
| | - Luis Espinoza
- Departamento de Química, Universidad Técnico Federico Santa María, Av. España 1680, Valparaiso, Chile
| | - Alejandro Madrid
- Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Valparaiso, Chile
| | - Jaime Mella
- Facultad de Ciencias, Instituto de Química, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaiso, Chile
| | - Eduardo Chávez-Weisser
- Departamento Laboratorios y Estaciones Cuarentenarias, Servicio Agrícola y Ganadero, Ruta 68 #19100 (Km. 12), Pudahuel, Santiago, Chile
| | - Katy Diaz
- Departamento de Química, Universidad Técnico Federico Santa María, Av. España 1680, Valparaiso, Chile.
| | - Mauricio Cuellar
- Facultad de Farmacia, Centro de Investigación Farmacopea Chilena, Universidad de Valparaíso, Av. Gran Bretaña 1093, Valparaiso, Chile
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Singha NR, Roy C, Mahapatra M, Dutta A, Deb Roy JS, Mitra M, Chattopadhyay PK. Scalable Synthesis of Collagenic-Waste and Natural Rubber-Based Biocomposite for Removal of Hg(II) and Dyes: Approach for Cost-Friendly Waste Management. ACS OMEGA 2019; 4:421-436. [PMID: 31459340 PMCID: PMC6648228 DOI: 10.1021/acsomega.8b02799] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Accepted: 12/10/2018] [Indexed: 05/21/2023]
Abstract
For initiating a prosperous cost-friendly waste management of small-scale industries, cow buffing dust (CBD), one of the abundantly available semisynthetic collagenic solid wastes, has been used as a nonsulfur cross-linker of natural rubber (NR) for fabricating an NRCBD-biocomposite superadsorbent. The as-prepared reusable biocomposite bearing variegated collagenic and noncollagenic N-donors, along with the O-donors, has been reported for ligand-selective preferential superadsorption from waste water. Thus, a CBD and NR-based scalable biocomposite bearing optimum cross-linking, excellent physicochemical properties, and reusability has been developed via systematic optimization of the torque and reaction time for cost-friendly adsorptive exclusion of dyes, such as 2,8-dimethyl-3,7-diamino-phenazine (i.e., safranine, SF) and (7-amino-8-phenoxazin-3-ylidene)-diethylazanium dichlorozinc dichloride (i.e., brilliant cresyl blue), BCB, and Hg(II). The CBD-aided curing of NR has been achieved through the formation of a cross-linked chromane-ring originated via reaction between the methylol-phenol ring of phenol-formaldehyde resin and isoprene unit of NR. The partial disappearance of unsaturation in cured-NRCBD, relative variation of crystallinity, surface properties, elevated thermal stabilities, and ligand-selective superadsorption have been studied by advanced microstructural analyses of unadsorbed and/or adsorbed NRCBD using Fourier transform infrared (FTIR), 13C nuclear magnetic resonance, ultraviolet-visible, and O 1s-/N 1s-/C 1s-/Hg 4f7/2,5/2-X-ray photoelectron spectroscopies, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive spectroscopy, and pHPZC. Response surface methodology-based optimization has been employed to attain the optimum potential of NRCBD, considering the interactive effects between pHi, temperature, and concentration of the dye. H-aggregate and time-dependent hypochromic effect has been observed during individual adsorption of dyes. Moreover, the prevalence of chemisorption via ionic interaction between NRCBD and SF, BCB, and Hg(II) has been realized by FTIR, fitting of kinetics data to the pseudosecond-order model, and measurement of activation energies. The Brunauer-Emmett-Teller and Langmuir isotherms fit the best to BCB and SF/Hg(II), respectively. Thermodynamically spontaneous chemisorption have shown the maximum adsorption capacities of 303.61, 46.14, and 166.46 mg g-1 for SF, BCB, and Hg(II), respectively, at low initial concentration of Hg(II)/dyes = 40 ppm, 303 K, and adsorbent dose = 0.01 g.
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Affiliation(s)
- Nayan Ranjan Singha
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Chandan Roy
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Manas Mahapatra
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Arnab Dutta
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Joy Sankar Deb Roy
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Madhushree Mitra
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
| | - Pijush Kanti Chattopadhyay
- Advanced
Polymer Laboratory, Department of Polymer Science and Technology, and Department of
Leather Technology, Government College of Engineering and Leather
Technology (Post Graduate), Maulana Abul
Kalam Azad University of Technology,
Salt Lake, Kolkata 700106, West Bengal, India
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Rocha M, Di Santo A, Arias JM, Gil DM, Ben Altabef A. Ab-initio and DFT calculations on molecular structure, NBO, HOMO-LUMO study and a new vibrational analysis of 4-(Dimethylamino) Benzaldehyde. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:635-43. [PMID: 25448963 DOI: 10.1016/j.saa.2014.09.077] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/15/2014] [Accepted: 09/19/2014] [Indexed: 05/14/2023]
Abstract
The experimental and theoretical study on the molecular structure and a new vibrational analysis of 4-(Dimethylamino) Benzaldehyde (DMABA) is presented. The IR and Raman spectra were recorded in solid state. Optimized geometry, vibrational frequencies and various thermodynamic parameters of the title compound were calculated using DFT methods and are in agreement with the experimental values. A detailed interpretation of the IR and Raman spectra of the title compound were reported. The stability of the molecule arising from hyper-conjugative interactions and charge delocalization has been analyzed using NBO analysis and AIM approach. The HOMO and LUMO analysis were used to determine the charge transfer within the molecule and some molecular properties such as ionization potential, electron affinity, electronegativity, chemical potential, hardness, softness and global electrophilicity index. The TD-DFT approach was applied to assign the electronic transitions observed in the UV-visible spectrum measured experimentally. Molecular electrostatic potential map was performed by the DFT method. According to DSC measurements, the substance presents a melting point of 72.34°C and decomposes at temperatures higher than 193°C.
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Affiliation(s)
- Mariana Rocha
- INQUINOA, CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina
| | - Alejandro Di Santo
- INQUINOA, CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina
| | - Juan Marcelo Arias
- INQUINOA, CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina
| | - Diego M Gil
- INQUINOA, CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina.
| | - Aída Ben Altabef
- INQUINOA, CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina.
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