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Sensing of carbon monoxide via luminescence of ruthenium complexes containing a hemilabile phosphine pyrenyl ether ligand
| Content Provider | Semantic Scholar |
|---|---|
| Author | Thorne, Lisa |
| Copyright Year | 2004 |
| Abstract | Our laboratory previously reported a R u 2 + complex with a hemilabile phosphine ether ligand fcc-RuCl2(POC4Pyr-P,0)2 (14) (POC4Pyr = 4-{2(diphenylphosphino)phenoxy}butylpyrene). This complex reacts rapidly with carbon monoxide to produce a significant luminescence response in which the monomer: excimer emission ratio changes dramatically. The reaction with CO is accompanied by a geometric isomerization from the initial ?ra«s-dicarbonyl product, tttRuCl 2(CO) 2(POC4Pyr-P) 2, to the cis-dicarbonyl product, crt-RuCl 2(CO) 2(POC4PyrJP) 2. However, an OFF-ON response was not achieved. Two methodologies are explored in this thesis to obtain the desirable OFF-ON response by promoting pyrene fluorescence quenching before exposure to CO. Attempts are reported to synthesize ligands with tether lengths less than four carbon atoms in length in order to probe the effect of tether length between the pyrene moiety and the rest of the complex on fluorescence quenching. Although a ligand with a one-carbon tether ({2-(diphenylphosphino)phenoxy}methylpyrene) was not successfully synthesized, a ligand with a two-carbon tether (2-{2(diphenylphosphino)phenoxy}ethylpyrene) was obtained. However, attempts to coordinate this ligand with Ru were unsuccessful. A second strategy explored in this thesis is the effect of changing the halide ligands of complex 14 to either bromo (22) (tec-RuBr2(POC4Pyr-P,0)2) or iodo ligands (23) (fcc-Rul2(POC4Pyr-P,0)2). The different halogen ligands are expected to change the energies of the metal d-orbitals and possibly result in fluorescence quenching. This series of complexes with different halogen ligands has been fully characterized by N M R , |
| File Format | PDF HTM / HTML |
| DOI | 10.14288/1.0061175 |
| Alternate Webpage(s) | https://open.library.ubc.ca/media/download/pdf/831/1.0061175/2 |
| Alternate Webpage(s) | https://doi.org/10.14288/1.0061175 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
