التفاصيل البيبلوغرافية
| العنوان: |
Molecular engineering of logic gate types by module rearrangement in 'Pourbaix Sensors': the effect of excited-state electric fields. |
| المؤلفون: |
Spiteri JC; Department of Chemistry, Faculty of Science, University of Malta, Msida, MSD 2080, Malta. david.magri@um.edu.mt., Denisov SA, Jonusauskas G, Klejna S, Szaciłowski K, McClenaghan ND, Magri DC |
| المصدر: |
Organic & biomolecular chemistry [Org Biomol Chem] 2018 Aug 29; Vol. 16 (34), pp. 6195-6201. |
| نوع المنشور: |
Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101154995 Publication Model: Print Cited Medium: Internet ISSN: 1477-0539 (Electronic) Linking ISSN: 14770520 NLM ISO Abbreviation: Org Biomol Chem Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: |
Original Publication: Cambridge, UK : Royal Society of Chemistry, c2003- |
| مستخلص: |
Two types of fluorescent logic gates are accessed from two different arrangements of the same modular components, one as an AND logic gate (1) and the other as a PASS 0 logic gate (2). The logic gates were designed with an 'electron-donor-spacer1-fluorophore-spacer2-receptor' format and demonstrated in 1 : 1 (v/v) methanol/water. The molecules consist of ferrocene as the electron donor, 4-aminonaphthalimide as the fluorophore and a tertiary alkylamine as the receptor. In the presence of high H+ and Fe3+ levels, regioisomers 1a and 1b switch 'on' as AND logic gates with fluorescence enhancement ratios of 16-fold and 10-fold, respectively, while regioisomers 2a and 2b are functionally dormant, exhibiting no fluorescence switching. The PASS 0 logic of 2a and 2b results from the transfer of an electron from the excited state fluorophore to the ferrocenium unit under oxidising conditions as predicted by DFT calculations. Time-resolved fluorescence spectroscopy provided lifetimes of 8.3 ns and 8.1 ns for 1a and 1b, respectively. The transient signal recovery rate of 1b is ∼10 ps while that of 2b is considerably longer on the nanosecond timescale. The divergent logic attributes of 1 and 2 highlight the importance of field effects and opens up a new approach for regulating logic-based molecules. |
| تواريخ الأحداث: |
Date Created: 20180502 Date Completed: 20190304 Latest Revision: 20190304 |
| رمز التحديث: |
20221213 |
| DOI: |
10.1039/c8ob00485d |
| PMID: |
29714805 |
| قاعدة البيانات: |
MEDLINE |
