Kamil Langa, Pavel Kubátb, Jiří Mosingera,c Vladimír Králd, Pavel Lhotákd, and Dana M. Wagnerováa
	a Institute of Inorganic Chemistry, AS CR, 250 68 Řež, Czech Republic
	b J. Heyrovský Institute of Physical Chemistry, AS CR, 182 23 Praha 8,
	Czech Republic
	c Faculty of Sciences, Charles University, Hlavova 2030, 128 43 Praha 2,
	Czech Republic
	d Institute of Chemical Technology, Technická 5, 166 28 Praha 6, Czech Republic

	Water-Soluble Porphyrins:
	Cationic: meso-tetrakis(4-N-methylpyridyl)porphyrin (TMPyP)
	Anionic: meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS)
	Neutral: meso-fluorophenylporphyrin-bcyclodextrin conjugate
	Hosts:
	p-sulfonatocalix[X]arene; X = 4, 6, 8
	b-cyclodextrin, 2-hydroxypropyl-cyclodextrins
	photophysical characterization of the porphyrin complexes (electrostatic vs. hydrophobic interactions)
	how complexation effects the physico-chemical and photophysical properties of the porphyrins ?
	characterization of photoinduced intramolecular electron/energy processes within the porphyrin complexes

	good solubility in water
	low aggregation tendency in aqueous solutions
	fluorescence quenching of porphyrin emission after addition of quinones (benzoquinone, anthraquinone-2-sulfonate)
	association constants between quinones and the b-CD cavity were calculated from the Stern-Volmer plots: Kb ~ 103 M-1

	Sulfonatocalixarenes and cyclodextrins display different affinity for cationic and anionic porphyrins. The binding constants for the formation of the complexes TMPyP/CD, TMPyP/sulfonatocalixarene and TPPS/CD range between 103-105 M-1.
	The electrostatic nature of the interaction between TMPyP and calixarene is well visualized by comparison of complexing properties and effects of ionic strength.
	The effects of complexation on Ffluo, FT and lifetimes of the triplet states of the porphyrins depend on the size and the type of the receptor cavity. The comple-xation with calixarenes leads to considerable decrease of FT while interaction with cyclodextrins does not. This is due to different binding modes, i.e. Coulombic attraction for calixarenes and hydrophobic interactions for inclusion
	complexes of the porphyrins with CD.
	Sulfonatocalixarenes and cyclodextrins serve as hosts for binding redox active compounds. This arrangement leads to photoinduced electron transfer between the porphyrin in the excited singlet state and the electron acceptors.