Formation of a mixed valence copper(II)–copper(I) coordination polymer {[Cu(1,2-pn)2(μ3-I)Cu2(μ2-I)3(CH3CN)]⋅CH3CN}n: in situ reduction of copper(II) at ambient condition

Jana, Subrata; Chattopadhyay, Shouvik

doi:10.1080/00958972.2013.854340

Cited by 10 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Very often the synthetic procedure influences the nature of the obtained compounds in both structure and composition. − From the crystal engineering perspective, along with the Cu(I) coordination grids the mixed-valence Cu(II)–Cu(I) coordination networks are widely studied due to the different Cu(I) and Cu(II) (d 10 and d 9 ) coordination preferences that allow to manipulate the coordination architecture and dimensionalities of the final solids in view of the application requirements . The mixed-valence Cu(II)–Cu(I) compounds are obtained either starting from the mixture of Cu(II)/Cu(I) salts or by partial in situ reduction of Cu(II). − …”

Section: Introductionmentioning

confidence: 99%

Partial in Situ Reduction of Copper(II) Resulting in One-Pot Formation of 2D Neutral and 3D Cationic Copper(I) Iodide–Pyrazine Coordination Polymers: Structure and Emissive Properties

et al. 2017

View full text Add to dashboard Cite

On the way to copper(I) iodide coordination polymers with specific luminescent properties, the in situ reduction of Cu(II) in the presence of KI and bidentate N-heteroatomic ligand, either pyrazine (pyz) or 4,4'-bipyridine (bpy), resulted in one two-dimensional and two three-dimensional new coordination networks. Starting from Cu(NO)·3HO in the presence of pyz, successive precipitation of known yellow [(CuI)(pyz)], new orange [CuI(pyz)], and new dark blue {[Cu(pyz)]·I} polymeric solids was observed. Starting from the same salt in the presence of bpy resulted in the successive precipitation of known yellow [(CuI)(bpy)] and new brown {[Cu(NO)(bpy)]·I·(dmf·HO)} coordination polymers. By using either Cu(CHCOO)·HO or Cu(BF) as starting materials, both known forms, yellow [(CuI)(bpy)] and orange [CuI(bpy)], precipitated successively. The new solids were characterized by IR spectroscopy and X-ray analysis. [CuI(pyz)] represents the missing member in the row of two-dimensional coordination networks with general formula [CuX(pyz)] (X = Cl, Br, I). Its steady state and time-resolved characterization together with DFT and TDDFT calculations revealed that the emission at room temperature is mainly delayed fluorescence originating from mixed singlet metal-to-ligand charge transfer and halide-to-ligand charge transfer states, while that at 77 K is phosphorescence, associated with the small singlet-triplet energy differences (ΔE = 70 meV).

show abstract

Section: Introductionmentioning

confidence: 99%

Partial in Situ Reduction of Copper(II) Resulting in One-Pot Formation of 2D Neutral and 3D Cationic Copper(I) Iodide–Pyrazine Coordination Polymers: Structure and Emissive Properties

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The infrared spectra of both complexes show absorption bands around 3200 cm −1 assigned to NH 2 stretching vibration [20,21]. The splitting of the band corresponding to N-H stretching vibration (at 3191 and 3239 cm -1 ) in the IR spectrum of complex 1 ( Figure S2, Supporting Information), is indicative of the presence of N-H...I hydrogen bond [44], as also supported by the crystal structure.…”

Section: Ir and Electronic Spectramentioning

confidence: 72%

“…A similar pattern in the IR spectrum is also observed for complex 2. The bands corresponding to C-H stretching occur at 2900 cm -1 in the IR spectra of all three complexes [20,21]. The UV-Vis spectra of both complexes in acetonitrile show absorption bands at UV region due to charge transfer transitions.…”

Section: Ir and Electronic Spectramentioning

confidence: 95%

“…The relatively large copper(II)-iodide distance {3.0884(3) Å} is a direct consequence of the Jahn Teller effect, expected in d 9 copper(II) system. These types of longer copper(II)-iodide bond distances could also be found in literature [20,21]. Selected bond lengths and bond angles are given in Table 2 Table 3.…”

Section: [Cu(l 1 ) 2 Cui 3 ] (1)mentioning

confidence: 96%

“…Several mixed valence copper(II)-copper(I) complexes have been prepared by different groups via in situ partial oxidation of copper(I) by O 2 under ambient or hydrothermal condition [17][18][19]. Iodide usually acts as reducing agent and may cause partial reduction of copper(II) to copper(I), affording mixed valence copper(II)-copper(I) species [20][21]. On the other hand, in most of the examples, mixed valence copper(II)-copper(I) complexes reported in the literature, the unpaired electron is localized on one metal center.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical study on the degree of delocalization of unpaired spin in two mixed valence copper(II/I) complexes with isomeric chelating diamines and iodide

Jana

Bhowmik

Harms

et al. 2016

Inorganica Chimica Acta

Self Cite

View full text Add to dashboard Cite

Emissive Heterobimetallic Copper(I) Dicyanoaurate‐Based Coordination Polymers

Ovens

Leznoff

2016

ChemPlusChem

View full text Add to dashboard Cite

Five new CuI/[Au(CN)2]−‐based coordination polymer materials—Cu(py)2[Au(CN)2] (1), Cu(PPh3)(MeCN)[Au(CN)2]⋅MeCN (2 a), Cu(PPh3)(MeCN)[Au(CN)2] (2 b), Cu3(THT)4[Au(CN)2]3 (3 a) and Cu(THT)[Au(CN)2] (3 b)—were prepared and characterized in terms of their structural and photoluminescence properties, and thermal stability (py=pyridine, THT=tetrahydrothiophene). While 1 and 2 a/2 b adopted one‐dimensional zig‐zag chain structures with no Au⋅⋅⋅Au (aurophilic) bonding, 3 a and 3 b exhibited much more complex three‐dimensional frameworks featuring numerous aurophilic interactions; bridging THT units formed either eight‐membered Cu4S4 rings (3 a) or helical (Cu/S)n chains (3 b). When these materials are excited using a broad‐band UV source (365 nm), they each emit light of a distinct colour (except for 2 a): light green for 1, pale blue for 2 b, deep blue for 3 a, and violet for 3 b (λmax=506 nm (1), 464 nm (2 b), 457 nm (3 a) and 404 nm (3 b)). The emission band in 1, 2 b and 3 b was assigned to CuI/ligand/CN−‐based MLCT transitions, while the emission band of 3 a appears to be influenced by the presence of the aurophilic interactions in the structure. Materials 1 and 3 a lose their bound pyridine and THT, respectively, at 110 and 95 °C, respectively, indicating their potential utility as sensory materials.

show abstract

Formation of a mixed valence copper(II)–copper(I) coordination polymer {[Cu(1,2-pn)₂(μ₃-I)Cu₂(μ₂-I)₃(CH₃CN)]⋅CH₃CN}_n: in situ reduction of copper(II) at ambient condition

Cited by 10 publications

References 22 publications

Partial in Situ Reduction of Copper(II) Resulting in One-Pot Formation of 2D Neutral and 3D Cationic Copper(I) Iodide–Pyrazine Coordination Polymers: Structure and Emissive Properties

Partial in Situ Reduction of Copper(II) Resulting in One-Pot Formation of 2D Neutral and 3D Cationic Copper(I) Iodide–Pyrazine Coordination Polymers: Structure and Emissive Properties

Theoretical study on the degree of delocalization of unpaired spin in two mixed valence copper(II/I) complexes with isomeric chelating diamines and iodide

Emissive Heterobimetallic Copper(I) Dicyanoaurate‐Based Coordination Polymers

Contact Info

Product

Resources

About