Metal-free Inorganic Ligands for Colloidal Nanocrystals: S2–, HS–, Se2–, HSe–, Te2–, HTe–, TeS32–, OH–, and NH2–as Surface Ligands

2011 ◽  
Vol 133 (27) ◽  
pp. 10612-10620 ◽  
Author(s):  
Angshuman Nag ◽  
Maksym V. Kovalenko ◽  
Jong-Soo Lee ◽  
Wenyong Liu ◽  
Boris Spokoyny ◽  
...  
Keyword(s):  
Colloidal Nanocrystals ◽  
Surface Ligands ◽  
Metal Free ◽  
Inorganic Ligands

Inorganic Surface Ligands for Colloidal Nanomaterials

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Angshuman Nag ◽  
Hao Zhang ◽  
Eric Janke ◽  
Dmitri V. Talapin
Keyword(s):  
Ligand Exchange ◽  
Organic Ligands ◽  
Colloidal Nanocrystals ◽  
New Paradigm ◽  
Surface Design ◽  
Metal Chalcogenide ◽  
Metal Free ◽  
Capping Ligands ◽  
Inorganic Ligands ◽  
Long Chain

AbstractSince the discovery of metal chalcogenide complexes (MCCs) as capping ligands for colloidal nanocrystals (NCs) in 2009, the chemistry of inorganic ligands for NCs has provided a new paradigm for surface design of nanomaterials. Various inorganic anions including MCCs, metal-free chalcogenides, oxoanions/oxometallates, and halides/pseudohalides/halometallates have been employed to replace the original long-chain organic ligands on NCs. This ligand exchange can also be achieved through a two-step route using ligands stripping agents like HBF

ChemInform Abstract: Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands.

ChemInform ◽  
2009 ◽  
Vol 40 (34) ◽  
Author(s):  
Maksym V. Kovalenko ◽  
Marcus Scheele ◽  
Dmitri V. Talapin
Keyword(s):  
Colloidal Nanocrystals ◽  
Metal Chalcogenide ◽  
Surface Ligands

Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands

Science ◽  
2009 ◽  
Vol 324 (5933) ◽  
pp. 1417-1420 ◽  
Author(s):  
M. V. Kovalenko ◽  
M. Scheele ◽  
D. V. Talapin
Keyword(s):  
Colloidal Nanocrystals ◽  
Metal Chalcogenide ◽  
Surface Ligands

scholarly journals A sustainable future for photonic colloidal nanocrystals

2015 ◽  
Vol 44 (16) ◽  
pp. 5897-5914 ◽  
Author(s):  
Joel Q. Grim ◽  
Liberato Manna ◽  
Iwan Moreels
Keyword(s):  
Heavy Metal ◽  
Colloidal Nanocrystals ◽  
Metal Free ◽  
Sustainable Future

We discuss the prospects of replacing Cd- and Pb-based colloidal nanocrystals with heavy metal-free alternatives for photonic applications.

The Shadow Widths of Very Small Particles are Formed Independently of the Metal Cap Build Up on the Particle

1981 ◽  
Vol 39 ◽  
pp. 568-569
Author(s):  
George C. Ruben
Keyword(s):  
Gold Particle ◽  
Film Surface ◽  
Small Particles ◽  
Geometric Process ◽  
Metal Free ◽  
Shadow Area

The formation of shadows behind small particles has been thought to be a geometric process (GP) where the metal cap build up on the particle creates a shadow width the same size as or larger than the particle. This GP cannot explain why gold particle shadow widths are generally larger than the gold particle and may have no appreciable metal cap build up (fig. 1). Ruben and Telford have suggested that particle shadow widths are formed by the width dependent deflection of shadow metal (SM) lateral to and infront of the particle. The trajectory of the deflected SM is determined by the incoming shadow angle (45°). Since there can be up to 1.4 times (at 45°) more SM directly striking the particle than the film surface, a ridge of metal nuclei lateral to and infront of the particle can be formed. This ridge in turn can prevent some SM from directly landing in the metal free shadow area. However, the SM that does land in the shadow area (not blocked by the particle or its ridge) does not stick and apparently surface migrates into the SM film behind the particle.

Recent advancement in the electrocatalytic synthesis of ammonia

Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8065-8094 ◽  
Author(s):  
Xudong Wen ◽  
Jingqi Guan
Keyword(s):  
Metal Oxide ◽  
Oxide Catalysts ◽  
Single Atom ◽  
Metal Oxide Catalysts ◽  
Metal Free ◽  
Recent Advancement ◽  
Nanocomposite Catalysts

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

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