Special Issue "Organosilicon Chemistry"
A special issue of Molecules (ISSN 1420-3049).
Deadline for manuscript submissions: closed (31 August 2011)
Prof. Dr. Scott Sieburth
Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA 19122, USA
Interests: synthetic organic and medicinal chemistry; organosilicon chemistry
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed Open Access monthly journal published by MDPI.
Molecules 2011, 16(9), 8033-8040; doi:10.3390/molecules16098033
Received: 31 August 2011; in revised form: 8 September 2011 / Accepted: 14 September 2011 / Published: 16 September 2011| Download PDF Full-text (419 KB)
Article: Dissociation of the Disilatricyclic Diallylic Dianion [(C4Ph4SiMe)2]−2 to the Silole Anion [MeSiC4Ph4]− by Halide Ion Coordination or Halide Ion Nucleophilic Substitution at the Silicon Atom
Molecules 2011, 16(10), 8451-8462; doi:10.3390/molecules16108451
Received: 26 August 2011; in revised form: 1 October 2011 / Accepted: 1 October 2011 / Published: 10 October 2011| Download PDF Full-text (381 KB)
Molecules 2011, 16(11), 9697-9713; doi:10.3390/molecules16119697
Received: 27 September 2011; in revised form: 28 October 2011 / Accepted: 17 November 2011 / Published: 23 November 2011| Download PDF Full-text (243 KB)
Molecules 2012, 17(1), 527-555; doi:10.3390/molecules17010527
Received: 29 November 2011; in revised form: 29 December 2011 / Accepted: 2 January 2012 / Published: 6 January 2012| Download PDF Full-text (582 KB)
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Unusual Thermal Degradation Behavior of Poly(dimethyl siloxane) Filled with Conductive Fillers
Authors: Jinho Hong and Sang Eun Shim
Affiliation: Department of Chemical Engineering, Inha University, 253 Yonghyundong, Namgu, Incheon 402-751, Korea; E-Mail firstname.lastname@example.org (S.E.S)
Abstract: It is a general belief that (conductive) fillers enhance the thermal stability of poly(dimethyl siloxane) (PDMS), thus the thermal degradation starts late for highly filled PDMS systems. Herein, we explored the unexpected thermal degradation behavior of PDMS containing high amounts of thermally conductive fillers such as boron nitride and silicon carbide together with carbon nanotube. The increased amount of thermally conductive filler enhanced the thermal stability, however, the faster thermal degradation was observed with the increased amount of electrically conductive filler in the presence of a high loading thermally conductive filler. The reason for this unusual observation may be due to the enhanced heat penetration into the PDMS molecules caused lby the presence of thermally conductive fillers.
Type of Paper: Article
Title: Analysis of Alkaloids by Liquid Chromatography (RP, HILIC and ion-exchange) by TLC-DAD and HPLC-DAD in Medicinal Herbs and Herbal Drugs
Author: Tomasz Tuzimski
Affiliation: Department of Physical Chemistry, Chair of Chemistry, Faculty of Pharmacy with Medical Analytics Division, Medical University in Lublin, 4A Chodźki Street, 20-093 Lublin, Poland, E-Mail: email@example.com
Abstract: Alkaloids are pharmacologically active compounds widely used as pharmaceuticals and synthesised as secondary methabolites in plants. Many of these compounds are strongly toxic. Therefore, they are often subject of scientific interests and analysis. Since alkaloids – basic compounds appear in aqueous solutions as ionized and unionized forms, they are difficult for chromatographic separation for peak tailing, poor systems efficiency, poor separation and poor column-to-column reproducibility. For this reason is necessity searching of more suitable chromatographic systems for analysis of the compounds.
The main objective of this study is to develop and compare the retention behavior of a group of basic compounds – alkaloids, investigation of separation selectivity for selected alkaloids (mostly isoquinoline alkaloids) of typical RP and HILIC stationary phases with different systems for hydrophilic interaction chromatography (HILIC) and reversed-phase chromatography (RP). Application of the two chromatographic systems (HILIC and RP) is especially useful for correct identification of components of difficult, complicated mixtures - determination of alkaloids in medicinal herbs. HILIC gives possibility of very fast determination of analytes in the original samples in the time shorter than 5 min.
Keywords: hydrophilic-interaction chromatography; reversed-phase high-performance liquid chromatography; alkaloids, Glaucium flavum; UV-spectra, HPLC-DAD, TLC-DAD
Last update: 21 April 2011