Thioester-appended organosilatranes: synthetic investigations and application in the modification of magnetic silica surfaces. (16th May 2016)

• Record Type: Journal Article
• Authors: Singh, Gurjaspreet; Rani, Sunita; Arora, Aanchal; Aulakh, Darpandeep; Wriedt, Mario
• Is Part Of: New journal of chemistry. Volume 40:Number 7(2016:Jul.)
• Page Start: 6200
• Page End: 6213
• Publication Date: 2016-05-16
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj00011h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Thioester tethered organosilatranes were synthesized. The substituent effect on the absorption spectra and potential for binding with Cu 2+ were explored. Abstract : The present investigation discloses a series of new organosilicon derivatives (3a–k ) tailored with substituted benzoic acid modules (1a–k ) via thioesterification with 3-mercaptopropylsilatrane (MPS). Product formation was authenticated using elemental analyses and different spectroscopic methods comprising FT-IR, NMR [ 1 H, 13 C] and LC-MS (Q-TOF). Thereafter, complete structural elucidation of compounds3c and3f was achieved by the single crystal X-ray technique. Photo-electronic inspection of all compounds by UV-Vis spectroscopy revealed their sensitivity towards substitution patterns. In addition, this is the first time that the potential of a silatranyl moiety has been tested for the modification of a silica surface pre-decorated with a magnetite core. The synthesis was achieved through a facile methodology involving chemical bonding at each stage, which proceeded without any external surfactant or template. The course of the reaction was followed by FT-IR, UV-Vis, XRD, TEM, FESEM, EDX and TGA techniques. Furthermore, the hybrid nanomaterial possessed significant sensorial ability toward copper ions, which makes the present protocol favourable for the construction of a new class of chelating ligands with an in-built multifunctional nanodevice.