47 documents found, page 1 of 5
Aerobic epoxidation of olefins by carboxylate ligand‐based cobalt (II) compound...
Patra, Birendra Nath; Ghosh, Pameli; Sepay, Nayim; Gayen, Saikat; Koner, Subratanath; Brandao, Paula; Lin, Zhi; Debnath, Rakesh; Pratihar, Jahar LalA new quinoline carboxylate-based cobalt (II) metal compound, [Co (HL1)2(H2O)4] (1) (H2L1 = 2-hydroxyquinoline-4-carboxylic acid) has been hydrothermally synthesized, and fully characterized by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier-transform infrared (FT-IR), elemental and thermo-gravimetric analysis. Compound 1 shows high thermal stability up to 300 C. Single-crystal X-ray diffrac...
Ultrasonic synthesis of Oct. trans-Br2Cu(N ∩ N)2) Jahn-Teller distortion comple...
Warad, Ismail; Musameh, Sharif; Sawafta, Ashraf; Brandao, Paula; Tavares, C. J.; Zarrouk, Abdelkader; Arnereih, Sameer; Al Ali, Anas; Shariah, RamiUnder mode of ultrasonic vibration, the neutral octahedral mononuclear [trans-CuBr2(N ∩ N)2]·3H2O complex with N ∩ N = 2,2-dimethylpropane-1,3-diamine was obtained. The structure of the desired complex was characterized by UV–Vis. spectroscopy, FT-IR, EDX, MS, SEM, TG/DTA and CHN-analysis. The octahedral-structure of the desired Cu(II) complex was proven via XRD single-crystal diffraction and its molecular inte...
Diethylenetriamine/diamines/copper (II) complexes [Cu(dien)(NN)]Br2: Synthesis,...
Saleemh, Fatima Abu; Musameh, Sharif; Sawafta, Ashraf; Brandao, Paula; Tavares, C. J.; Ferdov, S.; Barakat, Assem; Ali, Anas Al; Al-Noaimi, MousaTwo dicationic water soluble mixed triamine/diamine copper (II) complexes, of general formula [Cu(dien)NN]Br2(1–2) [dien = diethelenetriamine and NN is en = ethylenediamine or Me4en = N,N′,N,N′-tetramethylethylenediamine] were prepared under ultrasonic mode with a relatively high yield. These complexes were characterized by elemental microanalysis, UV visible IR spectroscopy, and thermal and electrochemical tec...
Deprotonation Induced Ligand Oxidation in a Ni-II Complex of a Redox Noninnocen...
Sikari, Rina; Sinha, Suman; Jash, Upasona; Das, Siuli; Brandao, Paula; de Bruin, Bas; Paul, Nanda D.Two nickel(II)-complexes, [Ni-II(H3L)(2)] (ClO4)(2) ( [1]-(ClO4)(2)) and [Ni-II(HL)(2)] (2), containing the redox-active tridentate ligand N-1-(2-aminophenyl)benzene-1,2-diamine (H3L) have been synthesized. Complex [1] (ClO4)(2) is octahedral containing two neutral H3L ligands in a facial coordination mode, whereas complex 2 is a singlet diradical species with approximately planar configuration at the tetracoor...
Design, synthesis and properties of orthopalladated complexes: Proheterogeneous...
Das, Uttam; Pattanayak, Poulami; Patra, Debprasad; Brandao, Paula; Felix, Vitor; Chattopadhyay, SurajitThe reaction of multidentate ligand, 34(E)-(24(E)-4-aryldiazenyl)phenylimino)methypbenzene-1,2-diol, H2L (H2L1, 1a; H2L2, 1b and H2L3, 1c) and (E)-2-((2-(aryldiazenyl)phenylamino)methyl)phenol, HA (HA(1), 3a; HA(2), 3b and HA(3), 3c) [where H represents the dissociable protons upon complexation, and aryl groups of H2L and HA are phenyl for H2L1 and HA(1), p-methylphenyl for H2L2 and HA(2), and p-chlorophenyl fo...
Valence tautomerism induced nucleophilic ipso substitution in a coordinated tet...
Panja, Anangamohan; Jana, Narayan Ch; Patra, Moumita; Brandao, Paula; Moore, Curtis E.; Eichhorn, David M.; Frontera, AntonioTwo new manganese(III) complexes, [pyH][Mn(Br(4)Cat)(2)(PY)1 (1) and [Mn(Br(4)Cat)(Br(3)PYCat)(PY)(2)] (2), where py is pyridine, Br(4)CatH(2) is tetrabromocatechol and Br(3)pyCatH(2) is 3,5,6-tribromo-4-pyridiniumcatechol, derived from redox 'noninnocent' bromo-substituted catecholate ligands are reported. Both complexes were characterized by various spectroscopic techniques in addition to the single crystal X...
Facile synthesis, structural evaluation, antimicrobial activity and synergistic...
Kumar, Sanjeev; Sharma, Nidhi; Maurya, Indresh K.; Bhasin, Aman K. K.; Wangoo, Nishima; Brandao, Paula; Felix, Vitor; Bhasin, K. K.; Sharma, Rohit K.A simple and efficient method has been described to synthesize the hitherto unknown imidazo[1,2-a] pyridine selenides (5a-1) by reaction of 2-chloroimidazo [1,2-a]pyridines with aryl/heteroaryl selenols, generated in situ by reduction of various diselenides with hypophosphorous acid. The crystal structures of 3-nitro-2-(phenylselanyl)-imidazo[1,2-a]pyridine (5a), 2-(mesitylselanyl)-3-nitro-imidazo[1,2-a]pyridin...
Synthesis, structures, electronic properties and DFT calculations of cobalt(II)...
Jana, Narayan Ch.; Adak, Sarmistha; Brandao, Paula; Mandal, Tarun Kanti; Panja, AnangamohanThe present work reports the syntheses of two cobalt(II) complexes, 1 and 2, with a naturally occurring redox non-innocent 2-hydroxy-1,4-naphthoquinone ligand in the presence of two substituted pyridines as ancillary ligands, one with an electron withdrawing group and the other with an electron donor group. Both compounds have been characterized in the solid state by IR spectroscopy and in solution by UV-Vis sp...
Tuning of azine derivatives for selective recognition of Ag plus with the in vi...
Ghosh, Abhijit; Adhikari, Sangita; Ta, Sabyasachi; Banik, Avishek; Dangar, Tushar Kanti; Mukhopadhyay, Subhra Kanti; Sanmartin Matalobos, JesusSeveral azine derivatives have been prepared and structurally characterized by spectroscopic and single-crystal X-ray diffraction analysis. Two of them, viz. naphthalene based (A10) and anthracene based (A11) show fluorescence enhancement in the presence of Ag+ in aqueous-methanol. Moreover, A11 efficiently tracks Ag+ in vitro endophytic bacteria infected rice root tissue. Experimental results have been substan...
A robust fluorescent chemosensor for aluminium ion detection based on a Schiff ...
Banerjee, Saikat; Brandao, Paula; Saha, AmritaIn this present work we have reported the synthesis and structural characterisations of a N2O2 donor Schiff base chemosensor with an azo arm (H2L). Various spectroscopic tools like single crystal X-ray, NMR, UV-vis, FTIR, ESI-mass spectrometry etc. have been deployed to develop the present work. In recent years a number of azo derived chemosensors have been reported by different research groups. This is first t...