Wavelength-dependent stereodifferentiation in the fluorescence quenching of asymmetric naphthalene-based dyads by amines
Abad, S; Pischel, U; Miranda, MA
| HERO ID | 1468551 |
|---|---|
| In Press | No |
| Year | 2005 |
| Title | Wavelength-dependent stereodifferentiation in the fluorescence quenching of asymmetric naphthalene-based dyads by amines |
| Authors | Abad, S; Pischel, U; Miranda, MA |
| Journal | DUPE - Journal of Physical Chemistry A |
| Volume | 109 |
| Issue | 12 |
| Page Numbers | 2711-2717 |
| Abstract | In the present contribution, wavelength has been used as a tunable parameter to achieve selective control of the photophysics of two novel asymmetric bichromophoric dyads composed of naphthalene units, i.e., 6-methoxynaphthalene (NPX) and 1-methylnaphthalene (NAP) derivatives, with different electronic properties, connected by an amide spacer [(S,S) and (S,R)-NPX-NAP]. As model systems, relevant monochromophoric compounds (NPX-M and NAP-M) have also been investigated. While upon excitation at 325 nm the light energy remained in the NPX moiety, at 290 nm an efficient singlet-singlet energy transfer (phi(SSET) of about 97%) from the NAP unit to the NPX chromophore dominated. A remarkable stereodifferentiation was observed in the excited-state quenching by triethylamine via exciplex formation. The results demonstrate that it is possible to control configuration-dependent interactions in the excited state by wavelength tuning. This can be rationalized through intramolecular interactions of pi systems leading to modulation of the redox properties. |
| Doi | 10.1021/jp047996a |
| Pmid | 16833581 |
| Wosid | WOS:000227993600001 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-17144374027&doi=10.1021%2fjp047996a&partnerID=40&md5=d8061d9126f9a73553ae357444d62f87 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |