Results 71 to 80 of about 57,276 (400)

Designing for Degradation: Transient Devices Enabled by (Nano)Cellulose

Advanced Materials, EarlyView.
Recent progress in transient devices enabled by (nano)cellulosic materials is reviewed. Transiency mechanisms, advantages of nanocelluloses, and a suite of applications are discussed. A circular thinking approach coupled with life cycle assessment is applied to critically revisit the potential, advantages, and challenges of nanocellulose‐enabled ...
Lucas J. Andrew, Erlantz Lizundia, Mark J. MacLachlan   +2 more
wiley   +1 more source

Reduction of the Thermal Conductivity of Polyurethanes by Fluorination: Impact of Crystallinity, Atomic Density, and Sound Velocity

Angewandte Chemie, EarlyView.
This study provides a rich database of structure–property relationships that will help guide future work in designing polymers with low intrinsic thermal conductivity. Fluorinated polymers are widely utilized in industry for their outstanding hydrophobicity, chemical resistance, and heat resistance. Our study provides insights that fluorinated polymers
Jingyi Zhou, Chen Chen, Jinchi Sun, Thomas R. Fielitz, Weijun Zhou, David G. Cahill, Paul V. Braun   +6 more
wiley   +2 more sources

A Facile Synthesis of C-terminal Neoglycopeptides: Incorporation of Urea Moiety between Sugars and Peptides Employing Curtius Rearrangement [PDF]

, 2008
Incorporation of urea moiety in the synthesis of C-terminal neoglycopeptides has been demonstrated through the reaction between suitably protected glycosylamine and Fmoc-peptidyl isocyanates or carbamates.
Hemantha, H.P., Sureshbabu, V.V., Venkataramanarao, R.   +2 more
core   +1 more source

High‐Performance Recyclable Polyester Elastomers Through Transient Strain‐Stiffening

Advanced Materials, EarlyView.
Transient strain‐crystallization simultaneously strengthens and toughens block polyester elastomers while conserving recyclability. Using controlled polymerization catalysis and commercial monomers, block polyester elastomers outperform current commercial elastomers, entering a new region of tensile mechanical property space.
Chang Gao, Kam C. Poon, Matilde Concilio, Thomas Zinn, Georgina L. Gregory, Charlotte K. Williams   +5 more
wiley   +1 more source

PPh3/Isocyanide and N2/Isocyanide Exchange: Pathways to Isolable Alkali Metal Keteniminyl Anions

Angewandte Chemie, EarlyView.
The synthesis of isolable keteniminyl anions through substitution of the phosphine ligand in metalated ylides or the N₂ ligand in diazomethanides with isocyanides is reported. The anions feature a bent geometry, with the angle decreasing with increasing donor ability of the nitrogen substituent, and exhibit broad applicability in the formation of ...
Sunita Mondal, Yihao Zhang, Prakash Duari, Kai‐Stephan Feichtner, Arpan Das, Lili Zhao, Gernot Frenking, Viktoria H. Gessner   +7 more
wiley   +2 more sources

Molecules with a peptide link in protostellar shocks: a comprehensive study of L1157 [PDF]

, 2014
Interstellar molecules with a peptide link -NH-C(=O)-, like formamide (NH$_2$CHO), acetamide (NH$_2$COCH$_3$) and isocyanic acid (HNCO) are particularly interesting for their potential role in pre-biotic chemistry. We have studied their emission in the protostellar shock regions L1157-B1 and L1157-B2, with the IRAM 30m telescope, as part of the ASAI ...
arxiv   +1 more source

Kinetic study of an on-chip isocyanate derivatization reaction by on-line nano-esi ms [PDF]

, 2005
A high-throughput method is presented for the study of reaction kinetics by nano- electrospray ionization mass spectrometry (nano-ESI MS). The reaction of propyl isocyanate (2), benzyl isocyanate (3), and toluene-2,4-diisocyanate (4) with 4-nitro-7 ...
Berg, A. van den, Brivio, M., Karst, U., Liesner, A., Oosterbroek, R.E., Reinhoudt, D.N., Verboom, W.   +6 more
core   +1 more source

Synthesis of N-Z, N′-Formyl α-Amino Acid Derived Gem-Diamines [PDF]

, 2008
A variety of N-carbobenzoxy, N′-formyl gem-diaminoalkyl derivatives have been obtained through Goldsmith-Wick reaction of Z-α-amino acid/peptide acid derived isocyanates with 96% HCOOH in presence of 4-dimethylaminopyridine (DMAP) as catalyst.
Narendra, N., Sureshbabu, V.V.
core   +2 more sources

Blocked isocyanates: from analytical and experimental considerations to non-polyurethane applications

, 2016
In this review we aim to provide an introductory guide to blocked isocyanates, through discussion on different examples of blocking groups, along with experimental considerations for their application.
Marianne S. Rolph, A. Markowska, Colin N. Warriner, R. O’Reilly   +3 more
semanticscholar   +1 more source

Pairing N‐Vacancy and Adjacent Ni‐Sites in the Local Microenvironment to Regulate the Urea Oxidation Reaction Pathway With Enhanced Kinetics

Advanced Materials, EarlyView.
In nitrogen vacancies‐rich nickel nitride (Ni3N‐VN), a local microenvironment of nitrogen vacancies and adjacent Ni sites is formed. The electron‐rich Ni‐sites can be converted to NiOOH at a lower potential, and urea adsorption on the electron‐deficient nitrogen vacancy region is conducive to its partial dissociation, conceiving to efficient urea ...
Chengwei Ji, Huimei Duan, Chuanhui Wang, Guizeng Liang, Xiaojing Long, Xilin She, Rongrong Zhang, Feilong Gong, Daohao Li, Dongjiang Yang, Jian Liu   +10 more
wiley   +1 more source