Three green luminescent cadmium complexes containing 8-aminoquinoline ligands: Syntheses, crystal structures, emission spectra and DFT calculations

Xu, Heng; Huang, Liang H.; Guo, Limin; Zhang, Yuanguang; Ren, Xiao‐Ming; Song, You; Xie, Jingli

doi:10.1016/j.jlumin.2008.03.026

Cited by 39 publications

(5 citation statements)

References 37 publications

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“…Interestingly, in the optimized structure of the 1:1 (CdL) 2+ complex (Fig. 2B), the cadmium ion is well incorporated inside the twisted macrocyclic cavity and coordinated to six donating atoms of the ligand, including the two sulfur atoms, two C O oxygens, the etherial oxygen and the pyridine ring nitrogen, in an distorted octahedral geometry, as previously reported for some cadmium(II) complexes in the corresponding crystal structures [46]. It is interesting to note that, unlike the optimized ligand structure, the two amide group oxygens in the optimized complex structure are pointed inside the cavity ring so that they have the opportunity to participate in bond formation with the central cadmium ion.…”

Section: Preliminary Studiessupporting

confidence: 75%

Novel PVC-membrane potentiometric sensors based on a recently synthesized sulfur-containing macrocyclic diamide for Cd2+ ion. Application to flow-injection potentiometry

Shamsipur

Dezaki

Akhond

et al. 2009

Journal of Hazardous Materials

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Section: Preliminary Studiessupporting

confidence: 75%

Novel PVC-membrane potentiometric sensors based on a recently synthesized sulfur-containing macrocyclic diamide for Cd2+ ion. Application to flow-injection potentiometry

Shamsipur

Dezaki

Akhond

et al. 2009

Journal of Hazardous Materials

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“…Such PET process is prevented by the stable compoundations of Schiff base ligand (N, O) donor with Cd(II) metal ions preferably tight flexible binding. Thus the enhanced fluorescence intensity of Cd(II) compunds 1 & 2 may be due to mainly ‘chelation enhanced fluorescence’ (CHEF) . According to such effect the red shift fluorescence is increased due to conformational rigidity of the ligand system upon compoundation with Cd(II) metal centers during coordination polymer formation, a journey experiencing structural framework variation from 1D to 2D and also intermolecular interactions.…”

Section: Resultsmentioning

confidence: 99%

Syntheses, X-ray Crystal Structures, Photoluminescence Properties, Antimicrobial Activities and Hirshfeld Surface of Two New Cd(II) Azide/Thiocyanate Linked Coordination Polymers

Majumdar¹,

Babu

Das

et al. 2017

ChemistrySelect

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The reaction of cadmium(II) acetate salts with multisite coordinated compartmental Schiff base ligand N,N'-Bis(3methoxysalicylidenimino)-1,3-diaminopropane (H 2 L 1 ) in presence of co-lingand azido/thiocyanato afforded two new coordination polymers {[Cd 4 (N 3 ) 4 (L 1 ) 2 ]·H 2 O} n (1), [Cd 4 (SCN) 4 (L 1 ) 2 ] n (2). The obtained compounds, 1 and 2 are 1D and 2D coordination polymers respectively and they have been characterized by IR spectroscopy, UV-vis spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The variation in the extended forms of 1 and 2 is governed by the kind of coligands utilized in the reaction. The complete structural study reveals that, in both cases the fully deprotonated ligand [L 1 ] 2À has utilized all six potential coordination sites to hold a pair of Cd(II) ions. Moreover, [N 3 ] À in 1 is coordinating to metal atom by both trans end-to-end (EE m-1,3) and end-on (EO or m-1,1) mode and [SCN] À is showing only end-to-end (EE m-1,3) coordination mode in 2. The photo luminescent properties and antimicrobial activities of the compounds 1 and 2 were investigated and discussed in details. Upon irradiation with UV light Cd(II) polymeric compounds 1-2 exhibit deep blue emissions of 448 À 451 nm subjected to dimethyl sulfoxide solution due to p!p* intraligand fluorescence. Apart from, as a complementary revelation, intermolecular interactions with respect to percentages of hydrogen bonding in the crystal structures of two Cd(II) polymeric compounds were quantified by Hirshfeld surface and fingerprint plots analysis.

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“…This emission could be efficiently enhanced in coordination complex due to increasing of the rigidity of the ligand and reducing of energy loss by radiation less thermal vibrations [13,14]. The design and synthesis of desired structure luminescent complex is a challenge because the assembly of metal ion with ligand is sensitive to the delicate synthetic conditions [15]. Schiff-bases become one of the research hotspots owing to their strong coordination capability, biological activities, photochromic characteristics, etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, crystal structures and spectroscopic investigation of new Cu/Schiff-base complexes

Toumi

Rzaigui²,

Jannet

2014

JAC

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Three novel Copper complexes, [Cu(L1)2][CuCl2] (1), [Cu(L2)Cl] (2) and [Cu2(L3)3Cl2] (3), have been prepared by reaction of CuCl with the Schiff-base ligands L1: N,N’-bis(thiophen-2-ylmethylene)-ethane-1,2-diamine, L2: N,N’-bis(1H-pyrrol-2-ylmethylene)ethane-1,2-diamine and L3: N,N’-bis(2-nitrobenzylidene)-ethane-1,2-diamine in acetonitrile. The solid-state structures of these complexes were determined by X-ray diffraction from single crystal data and characterized by 1H and 13C NMR, IR and UV/Vis spectroscopies. This study shows that (1) is an ionic complex with a Cu(I)-centered cation and an isolated linear dichlorocuprate(I) anion, (3) is a dinuclear neutral complex of Cu(I) while (2) is a mononuclear neutral complex of Cu(II). In the three complexes, Cu is tetracordinated in different geometrical environments. The atomic arrangements and spectroscopic properties of the three complexes are reported. Complexes 1-3 exhibit, in the solid state at room temperature, photoluminescence between 320 and 550 nm.

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Three green luminescent cadmium complexes containing 8-aminoquinoline ligands: Syntheses, crystal structures, emission spectra and DFT calculations

Cited by 39 publications

References 37 publications

Novel PVC-membrane potentiometric sensors based on a recently synthesized sulfur-containing macrocyclic diamide for Cd2+ ion. Application to flow-injection potentiometry

Novel PVC-membrane potentiometric sensors based on a recently synthesized sulfur-containing macrocyclic diamide for Cd2+ ion. Application to flow-injection potentiometry

Syntheses, X-ray Crystal Structures, Photoluminescence Properties, Antimicrobial Activities and Hirshfeld Surface of Two New Cd(II) Azide/Thiocyanate Linked Coordination Polymers

Synthesis, crystal structures and spectroscopic investigation of new Cu/Schiff-base complexes

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