Resonance Raman studies of macrocyclic complexes. 1. Structural and electronic effects in synthetic metal(II) porphyrin analogs

1976 ◽  
Vol 98 (25) ◽  
pp. 7999-8006 ◽  
Author(s):  
William H. Woodruff ◽  
Richard W. Pastor ◽  
James C. Dabrowiak
Keyword(s):  
Resonance Raman ◽  
Macrocyclic Complexes ◽  
Electronic Effects ◽  
Synthetic Metal ◽  
Porphyrin Analogs

Electrochemical studies of macrocyclic complexes as synthetic porphyrin analogs

1980 ◽  
Vol 42 (3) ◽  
pp. 469-474 ◽  
Author(s):  
K.M. Kadish ◽  
D. Schaeper ◽  
L.A. Bottomley ◽  
M. Tsutsui ◽  
R.L. Bobsein
Keyword(s):  
Macrocyclic Complexes ◽  
Electrochemical Studies ◽  
Porphyrin Analogs

scholarly journals Ruthenium(II)-bis(4′-(4-ethynylphenyl)-2,2′:6′, 2″-terpyridine) — A versatile synthon in supramolecular chemistry. Synthesis and characterization

2011 ◽  
Vol 9 (6) ◽  
pp. 990-999 ◽  
Author(s):  
Ronald Siebert ◽  
Florian Schlütter ◽  
Andreas Winter ◽  
Martin Presselt ◽  
Helmar Görls ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Supramolecular Chemistry ◽  
Photophysical Properties ◽  
Resonance Raman Spectroscopy ◽  
Bathochromic Shift ◽  
Resonance Raman ◽  
Electronic Effects ◽  
Charge Transfer Transition ◽  
Click Reactions ◽  
Ligand Charge Transfer

AbstractA homoleptic ethynyl-substituted ruthenium(II)-bisterpyridine complex representing a versatile synthon in supramolecular chemistry was synthesized and analyzed by NMR spectroscopy, mass spectrometry and X-ray diffractometry. Furthermore, its photophysical properties were detailed by UV/Vis absorption, emission and resonance Raman spectroscopy. In order to place the results obtained in the context of the vast family of ruthenium coordination compounds, two structurally related complexes were investigated accordingly. These reference compounds bear either no or an increased chromophore in the 4′-position. The spectroscopic investigations reveal a systematic bathochromic shift of the absorption and emission maximum upon increasing chromophore size. This bathochromic shift of the steady state spectra occurs hand in hand with increasing resonance Raman intensities upon excitation of the metal-to-ligand charge-transfer transition. The latter feature is accompanied by an increased excitation delocalization over the chromophore in the 4′-position of the terpyridine. Thus, the results presented allow for a detailed investigation of the electronic effects of the ethynyl substituent on the metal-to-ligand charge-transfer states in the synthon for click reactions leading to coordination polymers.

Resonance Raman spectra of nitrosyl heme proteins and of porphyrin analogs

1980 ◽  
Vol 102 (18) ◽  
pp. 5815-5819 ◽  
Author(s):  
J. D. Stong ◽  
J. M. Burke ◽  
P. Daly ◽  
P. Wright ◽  
T. G. Spiro
Keyword(s):  
Raman Spectra ◽  
Heme Proteins ◽  
Resonance Raman ◽  
Resonance Raman Spectra ◽  
Porphyrin Analogs

On the Crystal Chemistry of Inorganic Nitrides: Crystal-Chemical Parameters and Opportunities in the Exploration of Their Compositional Space

2020 ◽  
Author(s):  
Olivier Charles Gagné
Keyword(s):  
Functional Properties ◽  
A Priori ◽  
Lone Pair ◽  
Length Variation ◽  
Electronic Effects ◽  
Statistical Knowledge ◽  
Redox Active ◽  
Multiply Bonded ◽  
Jahn Teller ◽  
Compositional Space

The scarcity of nitrogen in Earth’s crust, combined with challenging synthesis, have made inorganic nitrides a relatively-unexplored class of compounds compared to their naturally-abundant oxide counterparts. To facilitate exploration of their compositional space via <i>a priori</i> modeling, and to help <i>a posteriori</i> structure verification not limited to inferring the oxidation state of redox-active cations, we derive a suite of bond-valence parameters and Lewis-acid strength values for 76 cations observed bonding to N<sup>3-</sup>, and further outline a baseline statistical knowledge of bond lengths for these compounds. We examine structural and electronic effects responsible for the functional properties and anomalous bonding behavior of inorganic nitrides, and identify promising venues for exploring uncharted compositional spaces beyond the reach of high-throughput computational methods. We find that many mechanisms of bond-length variation ubiquitous to oxide and oxysalt compounds (e.g., lone-pair stereoactivity, the Jahn-Teller and pseudo Jahn-Teller effects) are similarly pervasive in inorganic nitrides, and are occasionally observed to result in greater distortion magnitude than their oxide counterparts. We identify inorganic nitrides with multiply-bonded metal ions as a promising venue in heterogeneous catalysis, e.g. in the development of a post-Haber-Bosch process proceeding at milder reaction conditions, thus representing further opportunity in the thriving exploration of the functional properties of this emerging class of materials.<br>

Design, Spectroscopic Charactarization and Antitumor Action of Synthetic Metal Complexes of Novel Benzohydrazide Oxime

2018 ◽  
Vol 8 (8) ◽  
pp. 1048-1072
Author(s):  
Abdou Saad El-Tabl ◽  
Moshira Mohamed Abd-El Wahed ◽  
Seham Abd-El Rafea El-Saied
Keyword(s):  
Metal Complexes ◽  
Antitumor Action ◽  
Synthetic Metal
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