Results 171 to 180 of about 135,103 (314)

Development of a Highly Selective Synthesis of 4–Substituted Tetrahydroquinolines: Substrate Scope and Mechanistic Study

Chemistry – A European Journal, Accepted Article.
Herein, we describe a general and selective deprotonation functionalization reaction of tetrahydroquinolines at the 4–position using organolithiums and phosphoramide ligands. In addition to the development of a direct deprotonation alkylation reaction with primary and secondary alkyl halides, a Negishi cross–coupling protocol was realized to afford ...
Jeanette Piña, Lupita S. Aguirre, Levi T. Litwiller, Hai T. Ly, Michael P. Crockett, Andy Thomas   +5 more
wiley   +1 more source

Modeling public mood and emotion: Twitter sentiment and socio-economic phenomena

, 2009
Johan Bollen, Alberto Pepe, Huina Mao
openalex   +2 more sources

Exploiting Activated Alkyne Chemistry for the Synthesis of Tailored Amphiphilic Janus Dendrimers with Aggregation‐Induced Emission and Their Assemblies for Cell Imaging

Chemistry – A European Journal, Accepted Article.
Amphiphilic Janus dendrimers (AJDs) are a promising class of macromolecules capable of self‐assembling into well‐defined nanostructures. In this study, AJDs were synthesized employing, for the first time, the activated alkyne‐hydroxyl "click" chemistry approach, enabling the construction of dendritic architectures under mild conditions.
Hossein Rasoulmosaedi, Marilyne Bélanger-Bouliga, Phuong Trang Nguyen, Steve Bourgault, Ali Nazemi   +4 more
wiley   +1 more source

BMC adds 'Post to Twitter' button

, 2009
Gavin Baker
openalex   +1 more source

Molecular Rectangles Featuring Two Parallel NCN‐Coordinated Platinum Units: Enhancing Near‐Infrared Emission Through Excimer Formation

Chemistry – A European Journal, EarlyView.
Macro‐cycling into the near‐infrared: By incorporating two cyclometallated Pt(II) units into opposite sides of a molecular rectangle, the formation of near‐infrared‐emitting excited states that span the two units is promoted in solution, compared to the corresponding, acyclic, tweezer‐like complexes. A degree of molecular reorganization is nevertheless
Rebecca J. Salthouse, Amit Sil, Piotr Pander, Fernando B. Dias, J. A. Gareth Williams   +4 more
wiley   +1 more source

Information Contagion: An Empirical Study of the Spread of News on Digg and Twitter Social Networks

, 2010
Kristina Lerman, Rumi Ghosh
openalex   +4 more sources

Twitter for Peer Review

, 2009
Martin Fenner
openalex   +1 more source

Multistate Dihydroazulene‐Spiropyran Dyads: Path‐Dependent Switchings and Refinement of the “meta ‐rule” of Photoactivity

Chemistry – A European Journal, Accepted Article.
Multistate switches are interesting systems for a plethora of potential applications, such as for data storage involving many different states or for logic operations characterized by specific outputs. The main challenge is to achieve a precise control of accessibility to a specific state via a given sequence of multiple stimuli. Here we have connected
Siri Krogh Vegge, Jonas N. Lienert, Marie Erskov Krogh, Stine G. Stenspil, Mathias Dowds, Jonathan K. S. Hansen, Christoffer Warming, Caroline von Aufschnaiter, Viktor Bliksted Roug Pedersen, Josef Wachtveitl, Martina Cacciarini, Mogens Brøndsted Nielsen   +11 more
wiley   +1 more source

Darwin on Twitter

, 2009
Roderic Page
openalex   +1 more source

Two‐photon excitation of bright diaza[4]helicenes for isotropic and circularly polarized emission

Chemistry – A European Journal, Accepted Article.
Helicenes are chiral organic dyes that are attracting growing attention due to the high tunability of their (chir)optical and electronic properties. In this work, a series of functionalized cationic diaza[4]helicenes based on dimethoxyquinacridinium (DMQA) scaffolds are presented.
Bibiana Fabri, Davide F. De Rosa, Dominic J. Black, Rebecca Mucci, Artemijs Krimovs, Robert Pal, Jerome Lacour   +6 more
wiley   +1 more source