المؤلفون: Mandal, Suman¹ (AUTHOR), Cordes, David B.² (AUTHOR), Slawin, Alexandra M.Z.² (AUTHOR), Saha, Nitis Chandra¹ (AUTHOR) nitis.saha@gmail.com

المصدر: Journal of Coordination Chemistry. 2024, Vol. 77 Issue 1/2, p170-187. 18p.

مصطلحات موضوعية: *X-ray crystallography, *SCHIFF bases, *PHOTOLUMINESCENCE, *HYDROGEN bonding interactions, *DNA, *SINGLE crystals, *ELEMENTAL analysis

مستخلص: Two new complexes, [Co(MPAFA)3](ClO4)2 (1) and [Ni(MPAFA)3](NO3)2·2H2O (2), of an 'NN' bidentate Schiff-base ligand, N-(furan-2-ylmethyl)-1-(5-methyl-1H-pyrazol-3-yl)methanimine (MPAFA), have been synthesized and characterized by physicochemical and spectral methods such as elemental analyses, conductance, IR, UV-Vis, and emission spectra. In both complexes, three ligands coordinate with a metal ion to form 1:3 complexes. Both 1 and 2 are distorted octahedral and cationic, behaving as 1:2 electrolytes. IR spectra showed that each of the ligands coordinates via the pyrazolyl tertiary nitrogen and the azomethine nitrogen atoms. Single crystal X-ray studies confirmed CoN6 and NiN6 coordination for 1 and 2, respectively, and showed that both complexes exhibit π...π stacking and various hydrogen bonding interactions. Both 1 and 2 are fluorescent and participate in DNA binding with calf thymus DNA (CT-DNA) via groove binding. [ABSTRACT FROM AUTHOR]

المؤلفون: Hockin, Bryony M., Mackenzie, Campbell F. R., Cordes, David B., Slawin, Alexandra M. Z., Robertson, Neil, Zysman-Colman, Eli

المصدر: Journal of Coordination Chemistry; Jan-Feb2021, Vol. 74 Issue 1-3, p361-379, 19p

مصطلحات موضوعية: COPPER, CHARGE transfer, X-ray diffraction, CHLOROFORM

مستخلص: We report the first example of a charge-neutral linear two-coordinate copper(I) complex bearing a sterically demanding acenaphthoimidazolylidene-based N-heterocyclic carbene (NHC) ligand. The identity and geometry of the complex are confirmed by single-crystal X-ray diffraction (XRD) analysis. The complex is poorly emissive at room temperature, showing either ligand-centered (LC) emission around 340 nm when excited at 300 nm or ligand-to-ligand charge transfer (LLCT) emission at 540 nm when excited at 420 nm; in chloroform, dual emission is observed upon photoexcitation at 300 nm. Nanosecond emission lifetimes were recorded for these processes. This is the first example of emissive linear copper(I) complexes containing this bulky NHC ligand. [ABSTRACT FROM AUTHOR]

: Copyright of Journal of Coordination Chemistry is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Pal, Amlan K.¹ (AUTHOR), Cordes, David B.² (AUTHOR), Pringouri, Konstantina³ (AUTHOR), Anwar, Muhammad U.³ (AUTHOR), Slawin, Alexandra M. Z.² (AUTHOR), Rawson, Jeremy M.³ (AUTHOR), Zysman-Colman, Eli¹ (AUTHOR) eli.zysman-colman@st-andrews.ac.uk

المصدر: Journal of Coordination Chemistry. Jun/Jul2016, Vol. 69 Issue 11-13, p1924-1937. 14p. 4 Diagrams, 7 Charts, 4 Graphs.

مصطلحات موضوعية: *COMPLEX compounds synthesis, *METAL complexes, *IRIDIUM compounds, *DIAZINES, *LIGANDS (Chemistry), *SINGLE crystals

مستخلص: Reaction of tetrakis(2-phenylpyridinato-C2,N′)(μ-dichloro)di-iridium with 3-(pyridin-2-yl)-4H-benzo[e][1,2,4]thiadiazine (L1) under neutral and basic media afforded the charged and neutral Ir-complexes,1and2, respectively, in good yields (63–79%). Single-crystal XRD analysis confirms that the ancillary ligands in both1and2bind to the iridium via coordination of N2of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur rapidly oxidizes to form2. The UV–vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charge transfer transitions that are typical of many heteroleptic iridium complexes. Complexes1and2were emissive at room temperature in the green and yellow region of the electromagnetic spectrum, respectively, albeit with poor photoluminescence quantum yield (ΦPL = 1.1–2.5%). [ABSTRACT FROM AUTHOR]

المؤلفون: Hua, Guoxiong, Du, Junyi, Cordes, David B., Arachchige, Kasun S. A., Slawin, Alexandra M. Z., Woollins, J. Derek

المصدر: Phosphorus, Sulfur & Silicon & the Related Elements; 2016, Vol. 191 Issue 3, p341-346, 6p

مصطلحات موضوعية: CHEMICAL synthesis, ORGANIC compounds, CHEMICAL reagents, CHEMICAL reactions, CHEMICAL yield, BENZONITRILE derivatives, SELENIUM compounds

مستخلص: A series of new selenium-containing heteroatom compounds were synthesized in good yields by the reaction of Woollins’ reagent with various organic substrates such as cyclohexylamine, N-benzoylbenzamide, benzoic anhydride, 4-fluoro-N-(2-oxo-2-phenylethyl)benzamide, N-benzoylbenzamide, benzoic anhydride, 3-(bromomethyl)benzonitrile, 1,2-diphenylethane-1,2-diol, and sodium alcoholate. Three representative X-ray structures are described. [ABSTRACT FROM AUTHOR]

: Copyright of Phosphorus, Sulfur & Silicon & the Related Elements is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)