A comparative topological study of different metal-metal and metal-ligand interactions in polynuclear organometallic clusters

2015 ◽  
Author(s):  
Juan F. Van der Maelen ◽  
Santiago García-Granda
Keyword(s):  
Organometallic Clusters ◽  
Metal Metal ◽  
Ligand Interactions ◽  
Metal Ligand

Multishell EXAFS Fitting Analysis of a Compositionally Precise Thiolate-Gold Nanocluster

2014 ◽  
Vol 1655 ◽  
Author(s):  
Daniel M. Chevrier ◽  
Amares Chatt ◽  
Peng Zhang ◽  
Chenjie Zeng ◽  
Rongchao Jin
Keyword(s):  
Structural Information ◽  
Gold Nanoclusters ◽  
Gold Nanocluster ◽  
Experimental Conditions ◽  
X Ray ◽  
Metal Metal ◽  
Ligand Interactions ◽  
Novel Applications ◽  
X Ray Absorption ◽  
Metal Ligand

ABSTRACTThiolate-gold nanoclusters exhibit unique optical, magnetic and chiral properties, which are attractive for novel applications in nanotechnology. A fundamental challenge facing these nanomaterials is being able to study and understand their physical properties in various experimental conditions. To overcome this, extended X-ray absorption fine structure (EXAFS) spectroscopy can be employed to probe the Au local structure of thiolate-gold nanoclusters in a variety of conditions, providing valuable structural information from multiple bonding environments (i.e. metal-metal and metal-ligand interactions). This study discusses a methodology for conducting a multishell EXAFS fitting analysis that can be implemented for thiolate-gold nanocluster systems. Specifically, experimental and simulated EXAFS data for Au36(SR)24 nanoclusters are examined with a total of 5 scattering paths fitted to the experimental data.

scholarly journals Different manifestations of enhanced π-acceptor ligation at every redox level of [Os(9-OP)L2]n, n = 2+, +, 0, − (9-OP− = 9-oxidophenalenone and L = bpy or pap)

2016 ◽  
Vol 45 (45) ◽  
pp. 18241-18251 ◽  
Author(s):  
Arijit Singha Hazari ◽  
Alexa Paretzki ◽  
Jan Fiedler ◽  
Stanislav Zalis ◽  
Wolfgang Kaim ◽  
...  
Keyword(s):  
Donor And Acceptor ◽  
Ligand Interactions ◽  
Redox Level ◽  
Metal Ligand

Enhanced metal–ligand and ligand–ligand interactions are promoted in an osmium complex with non-innocent donor and acceptor ligands.

scholarly journals Reversible Assembly of Terpyridine Incorporated Norbornene-Based Polymer via a Ring-Opening Metathesis Polymerization and Its Self-Healing Property

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1173 ◽  
Author(s):  
Jookyeong Lee ◽  
Hwi Moon ◽  
Keewook Paeng ◽  
Changsik Song
Keyword(s):  
Ring Opening ◽  
Transition Metal Ions ◽  
Self Healing ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Ligand Interactions ◽  
Healing Agent ◽  
Healing Property ◽  
External Stimuli ◽  
Metal Ligand

We induced a terpyridine moiety into a norbornene-based polymer to demonstrate its self-healing property, without an external stimulus, such as light, heat, or healing agent, using metal–ligand interactions. We synthesized terpyridine incorporated norbornene-based polymers using a ring-opening metathesis polymerization. The sol state of diluted polymer solutions was converted into supramolecular assembled gels, through the addition of transition metal ions (Ni2+, Co2+, Fe2+, and Zn2+). In particular, a supramolecular complex gel with Zn2+, which is a metal with a lower binding affinity, demonstrated fast self-healing properties, without any additional external stimuli, and its mechanical properties were completely recovered.

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