1 resultado para LC-MS-MS
em Bucknell University Digital Commons - Pensilvania - USA
Filtro por publicador
- ABACUS. Repositorio de Producción Científica - Universidad Europea (1)
- Abertay Research Collections - Abertay University’s repository (1)
- Aberystwyth University Repository - Reino Unido (2)
- Academic Archive On-line (Stockholm University; Sweden) (2)
- Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (4)
- Adam Mickiewicz University Repository (1)
- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (4)
- AMS Tesi di Laurea - Alm@DL - Università di Bologna (1)
- Aquatic Commons (3)
- ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (10)
- Archimer: Archive de l'Institut francais de recherche pour l'exploitation de la mer (3)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (22)
- Aston University Research Archive (14)
- Biblioteca de Teses e Dissertações da USP (2)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (22)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (14)
- Biblioteca Digital de Artesanías de Colombia (1)
- Biblioteca Digital de la Universidad Católica Argentina (11)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (4)
- Bioline International (2)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (48)
- Boston University Digital Common (1)
- Brock University, Canada (9)
- Bucknell University Digital Commons - Pensilvania - USA (1)
- CaltechTHESIS (1)
- Cámara de Comercio de Bogotá, Colombia (11)
- CentAUR: Central Archive University of Reading - UK (28)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (170)
- Comissão Econômica para a América Latina e o Caribe (CEPAL) (55)
- CORA - Cork Open Research Archive - University College Cork - Ireland (3)
- Deakin Research Online - Australia (20)
- Digital Commons - Michigan Tech (1)
- Digital Commons at Florida International University (14)
- DigitalCommons@The Texas Medical Center (2)
- Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
- Dokumentenserver der Akademie der Wissenschaften zu Göttingen (1)
- Doria (National Library of Finland DSpace Services) - National Library of Finland, Finland (1)
- DRUM (Digital Repository at the University of Maryland) (3)
- Duke University (5)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (4)
- FAUBA DIGITAL: Repositorio institucional científico y académico de la Facultad de Agronomia de la Universidad de Buenos Aires (2)
- Funes: Repositorio digital de documentos en Educación Matemática - Colombia (9)
- Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (21)
- Glasgow Theses Service (6)
- Greenwich Academic Literature Archive - UK (1)
- Helda - Digital Repository of University of Helsinki (14)
- Indian Institute of Science - Bangalore - Índia (9)
- Infoteca EMBRAPA (15)
- Instituto Nacional de Saúde de Portugal (5)
- Instituto Politécnico de Bragança (1)
- Instituto Politécnico do Porto, Portugal (5)
- National Center for Biotechnology Information - NCBI (3)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (7)
- Portal de Revistas Científicas Complutenses - Espanha (1)
- Publishing Network for Geoscientific & Environmental Data (11)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (94)
- Queensland University of Technology - ePrints Archive (45)
- Repositório Alice (Acesso Livre à Informação Científica da Embrapa / Repository Open Access to Scientific Information from Embrapa) (7)
- Repositório Digital da UNIVERSIDADE DA MADEIRA - Portugal (2)
- REPOSITORIO DIGITAL IMARPE - INSTITUTO DEL MAR DEL PERÚ, Peru (2)
- Repositório Institucional da Universidade de Aveiro - Portugal (4)
- Repositório Institucional da Universidade de Brasília (1)
- Repositório Institucional da Universidade Federal do Rio Grande - FURG (8)
- Repositorio Institucional de la Universidad Nacional Agraria (5)
- Repositorio Institucional de la Universidad Pública de Navarra - Espanha (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (77)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (3)
- SAPIENTIA - Universidade do Algarve - Portugal (8)
- Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (4)
- Scientific Open-access Literature Archive and Repository (1)
- Universidad Autónoma de Nuevo León, Mexico (10)
- Universidad de Alicante (1)
- Universidade de Lisboa - Repositório Aberto (2)
- Universidade de Madeira (1)
- Universidade Federal do Pará (1)
- Universidade Federal do Rio Grande do Norte (UFRN) (2)
- Universita di Parma (2)
- Universitat de Girona, Spain (1)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
- Université de Lausanne, Switzerland (8)
- Université de Montréal (3)
- Université de Montréal, Canada (22)
- University of Queensland eSpace - Australia (15)
- University of Washington (4)
- USA Library of Congress (1)
Resumo:
The synthesis of cyclic polystyrene (Pst) with an alkoxyamine functionality has been accomplished by intramolecular radical coupling in the presence of a nitroso radical trap Linear alpha,omega-dibrominated polystyrene, produced by the atom transfer radical polymerization (ATRP) of styrene using a dibrominated initiator, was subjected to chain-end activation via the atom transfer radical coupling (ATRC) process under pseudodilute conditions in the presence of 2-methyl-2-nitrosopropane (MNP). This radical trap-assisted, intramolecular ATRC (RTA-ATRC) produced cyclic polymers in greater than 90% yields possessing < G > values in the 0.8-0.9 range as determined by gel permeation chromatography (GPC). Thermal-induced opening of the cycles, made possible by the incorporated alkoxyamine, resulted in a return to the original apparent molecular weight, further supporting the formation of cyclic polymers in the RTA-ATRC reaction. Liquid chromatography-mass spectrometry (LC-MS) provided direct confirmation of the cyclic architecture and the incorporation of the nitroso group into the macrocycle RTA-ATRC cyclizations carried out with faster rates of polymer addition into the redox active solution and/or in the presence of a much larger excess of MNP (up to a 250:1 ratio of MNP:C-Br chain end) still yielded cyclic polymers that contained alkoxyamine functionality.