scholarly journals Synthesis and Structural Characterization of a Silver(I) Pyrazolato Coordination Polymer

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1015
Author(s):  
Kiyoshi Fujisawa ◽  
Takuya Nemoto ◽  
Yui Morishima ◽  
Daniel B. Leznoff
Keyword(s):  
Solid State ◽  
Coordination Polymer ◽  
Emission Spectra ◽  
Supramolecular Assembly ◽  
Luminescent Properties ◽  
Spectroscopic Properties ◽  
Coinage Metal ◽  
Argentophilic Interactions ◽  
Linear Coordination

Coinage metal(I)···metal(I) interactions are widely of interest in fields such as supramolecular assembly and unique luminescent properties, etc. Only two types of polynuclear silver(I) pyrazolato complexes have been reported, however, and no detailed spectroscopic characterizations have been reported. An unexpected synthetic method yielded a polynuclear silver(I) complex [Ag(μ-L1Clpz)]n (L1Clpz− = 4-chloride-3,5-diisopropyl-1-pyrazolate anion) by the reaction of {[Ag(μ-L1Clpz)]3}2 with (nBu4N)[Ag(CN)2]. The obtained structure was compared with the known hexanuclear silver(I) complex {[Ag(μ-L1Clpz)]3}2. The Ag···Ag distances in [Ag(μ-L1Clpz)]n are slightly shorter than twice Bondi’s van der Waals radius, indicating some Ag···Ag argentophilic interactions. Two Ag–N distances in [Ag(μ-L1Clpz)]n were found: 2.0760(13) and 2.0716(13) Å, and their N–Ag–N bond angles of 180.00(7)° and 179.83(5)° indicate that each silver(I) ion is coordinated by two pyrazolyl nitrogen atoms with an almost linear coordination. Every five pyrazoles point in the same direction to form a 1-D zig-zag structure. Some spectroscopic properties of [Ag(μ-L1Clpz)]n in the solid-state are different from those of {[Ag(μ-L1Clpz)]3}2 (especially in the absorption and emission spectra), presumably attributable to this zig-zag structure having longer but differently arranged intramolecular Ag···Ag interactions of 3.39171(17) Å. This result clearly demonstrates the different physicochemical properties in the solid-state between 1-D coordination polymer and metalacyclic trinuclear (hexanuclear) or tetranuclear silver(I) pyrazolate complexes.

Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative

1999 ◽  
Vol 598 ◽  
Author(s):  
J. Morgado ◽  
R. Iqbal ◽  
G. Yahioglu ◽  
L. R. Milgrom ◽  
S. C. Moratti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Phenylene Vinylene ◽  
Efficient Energy Transfer ◽  
Light Emitting ◽  
Efficient Energy ◽  
Small Absorption ◽  
Pl Emission

ABSTRACTThe solid state luminescent properties of new statistical copolymers of 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene and a porphyrin-substituted phenylene vinylene are reported. The photoluminescence, PL, emission shows an efficient energy transfer to the porphyrin, in spite of the small absorption coefficient of the porphyrin in the wavelength range of the poly [2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylene vinylene], MEH-PPV, emission. At a porphyrin content of 0.25%, by weight, the emission is already dominated by the porphyrin. The PL efficiency of these copolymers is significantly reduced from the value of 13% for MEH-PPV down to 3% for the copolymer with 10.84% of porphyrin. Efficient energy transfer is also observed in the emission spectra of light-emitting diodes.

Tuning solid state luminescent properties in a hydrogen bonding-directed supramolecular assembly of bis-cyclometalated iridium(iii) ethylenediamine complexes

2012 ◽  
Vol 41 (16) ◽  
pp. 4919 ◽  
Author(s):  
Anna Maria Talarico ◽  
Elisabeta Ildyko Szerb ◽  
Teresa F. Mastropietro ◽  
Iolinda Aiello ◽  
Alessandra Crispini ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Solid State ◽  
Supramolecular Assembly ◽  
Luminescent Properties

Synthesis and luminescent properties of La1−xNdxP5O14 nanocrystals

2014 ◽  
Vol 16 (33) ◽  
pp. 18004-18009 ◽  
Author(s):  
L. Marciniak ◽  
W. Strek ◽  
Y. Guyot ◽  
D. Hreniak
Keyword(s):  
Dopant Concentration ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Spectroscopic Properties ◽  
Branching Ratios ◽  
Luminescence Decay ◽  
The Impact

The impact of dopant concentration on spectroscopic properties of La1−xNdxP5O12 nanocrystals: the luminescence decay profiles – (a); emission spectra – (b); and luminescence branching ratios – (c).

Copper(II) Complexes of a Tripyridyl Ligand: Anion-Dependent Metallosupramolecular Structures

2013 ◽  
Vol 66 (11) ◽  
pp. 1447 ◽  
Author(s):  
James E. M. Lewis ◽  
James D. Crowley
Keyword(s):  
Mass Spectrometry ◽  
Solid State ◽  
Coordination Polymer ◽  
Elemental Analysis ◽  
Spectroscopic Properties ◽  
Nitrate Salt ◽  
X Ray Diffraction ◽  
X Ray ◽  
Salt Structure ◽  
Solid State Structures

A series of copper(ii) complexes of the ligand 2,6-bis(pyridin-3-ylethynyl)pyridine have been synthesised and characterised by 1H and DOSY NMR, IR and UV-Vis spectroscopies, mass spectrometry, elemental analysis and single crystal X-ray diffraction. In solution these systems display almost identical spectroscopic properties, however the solid state structures are shown to vary widely, depending upon the choice of anion. The tetrafluoroborate salt was revealed to be a discrete Cu2L4 cage-like helicate. The tosylate salt, whilst of the same Cu2L4 stoichiometry, was shown to be a coordination polymer. Finally the nitrate salt structure was observed to be a discrete Cu2L2 metallocycle.

Spectroscopy of Chromium Doped Garnets in a Wide Temperature Range

2007 ◽  
Vol 1053 ◽  
Author(s):  
Humeyra Orucu ◽  
Gonul Ozen ◽  
John Collins ◽  
Baldassare Di Bartolo
Keyword(s):  
Solid State ◽  
Thermal Effects ◽  
Near Infrared ◽  
Energy Levels ◽  
Emission Spectra ◽  
Spectroscopic Properties ◽  
Solid State Laser ◽  
Laser Materials ◽  
Chromium Ion ◽  
Wide Range

ABSTRACTChromium doped garnets are tunable solid state laser materials which emit in the red and near infrared. We have studied the emission spectra of Y3Al5O12:Cr3+ (YAG:Cr), Gd3Ga5O12:Cr3+ (GGG:Cr) and Gd3Sc2Ga3O12:Cr3+ (GSGG:Cr) in a wide range of temperatures 25-800 K and have related their spectroscopic properties to the interaction between the 2E and 4T2 energy levels of the chromium ion. The measurements included absorption, lifetime, luminescence under continuous and pulsed excitations, and thermal effects on sharp lines.

Preparation and Luminescent Properties of Zn2SiO4:Mn2+

2008 ◽  
Vol 368-372 ◽  
pp. 375-377 ◽  
Author(s):  
Li Mei Cao ◽  
Wen Bo Bu ◽  
Chuan Ai Ren ◽  
Xiao Xu ◽  
Qiang Li
Keyword(s):  
Solid State ◽  
Active Carbon ◽  
Solid State Reaction ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Zinc Nitrate ◽  
Manganese Nitrate ◽  
Reducing Atmosphere ◽  
Pure Sio2

Zn2SiO4:Mn2+ was synthesized via a dipping method. Stoichiometric high pure SiO2 was put into the solution of zinc nitrate and manganese nitrate. The mixture was milled while being heated until the water was vaporized completely. The as-received mixture was added into the ethanol, and dispersed well, then the mixture was milled and heated to remove the ethanol thoroughly by evaporation. The precursor were dried for several hours at 60°C, and annealed in a reducing atmosphere of active carbon at 1000°C for 4 h. As-prepared powders of Zn2SiO4:Mn2+ was tested by XRD and SEM. Its luminescent properties were characterized by excitation and emission spectra. The results are compared with those of Zn2SiO4:Mn2+ prepared by a general solid state reaction.

Synthesis and Structural Characterization of a Monofunctionalized Phloroglucin-Derivative: A Precursor for Heterotrinuclear meta-Phenylene Bridged Complexes

2006 ◽  
Vol 61 (6) ◽  
pp. 753-757 ◽  
Author(s):  
Thorsten Glaser ◽  
Maik Heidemeier ◽  
Erich Krickemeyer ◽  
Hartmut Bögge
Keyword(s):  
Solid State ◽  
Coordination Polymer ◽  
Oxygen Atom ◽  
Structural Characterization ◽  
Magnetic Measurements ◽  
One Dimensional ◽  
Complex Forms ◽  
Neighboring Cation

As part of our synthetic efforts for new triplesalen derivatives, we reacted 2,4,6-triacetyl- 1,3,5-trihydroxybenzene (1) with excess Cu(ClO4)2 · 6H2O, imidazole, and ethylenediamine. However, not the triple ketimine derivative was formed but the mononuclear CuII complex [LCuII(ImH)]ClO4 · 0.5EtOH · 0.5H2O (HL = 6-(1-(2-aminoethylimino)ethyl)-2,4-diacetyl-1,3,5-trihydroxybenzene) with only one ketimine function. This complex forms a one-dimensional coordination polymer in the solid state through the apical binding of a keto-oxygen atom of one cation to the CuII ion of a neighboring cation. Magnetic measurements reveal the presence of weak antiferromagnetic intra-chain interactions

Spectroscopic characterization of silica aerogels prepared using several precursors – effect on the formation of molecular clusters

2017 ◽  
Vol 41 (14) ◽  
pp. 6742-6759 ◽  
Author(s):  
A. Borba ◽  
J. P. Vareda ◽  
L. Durães ◽  
A. Portugal ◽  
P. N. Simões
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Spectroscopic Characterization ◽  
Spectroscopic Properties ◽  
Silica Aerogels ◽  
Molecular Clusters

The structural and spectroscopic properties of silica aerogels were studied using complementary approaches, such as Fourier transform infrared spectroscopy and solid-state NMR spectroscopy.

A cyano and end-to-end azido bridged 3D copper(ii)–copper(i) mixed-valence coordination polymer and its transformation to copper nitride nanoparticles

RSC Advances ◽  
2014 ◽  
Vol 4 (64) ◽  
pp. 34110-34116 ◽  
Author(s):  
Manoj Trivedi ◽  
Gurmeet Singh ◽  
Abhinav Kumar ◽  
Nigam P. Rath
Keyword(s):  
Solid State ◽  
Coordination Polymer ◽  
Mixed Valence ◽  
Three Dimensional ◽  
State Transformation ◽  
Solid State Transformation ◽  
Copper Nitride ◽  
End To End

Syntheses and characterization of a CN and end-to-end N3 bridged three-dimensional Cu(II)–Cu(I) mixed valence polymer (1), with Cu-N3 system without CN (2) and a CN-bridged Cu analogue without N3 (3) are reported and solid-state transformation of the 1 to copper nitride nanoparticles performed.

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