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Fluorescent ratiometry of tetrahomodioxacalix[4]arene pyrenylamides upon cation complexation
- Issue Date
- Apr-2006
- Publisher
- AMER CHEMICAL SOC
- Citation
- ORGANIC LETTERS, v.8, no.8, pp 1601 - 1604
- Pages
- 4
- Journal Title
- ORGANIC LETTERS
- Volume
- 8
- Number
- 8
- Start Page
- 1601
- End Page
- 1604
- ISSN
- 1523-7060
1523-7052
- Abstract
- C-1,2-alternate tetrahomodioxacalix[4]arene pyreneamides were synthesized. Pb2+ coordination gave a quenched monomer and excimer fluorescence emission, while upon Ca2+ ion binding, the receptor provides an enhanced excimer and declined monomer emission with ratiometric response. The excimer emission spectra changes are rationalized by frontier molecular orbitals that the effective Py-Py* interaction induces emission intensity increases upon Ca2+ ion complexation, whereas there is no such interaction observed upon Pb2+ binding.
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