Synthesis, Photophysical and Photochemical Properties of Poly (oxyethylene)‐Substituted Phthalocyaninato Oxotitanium (IV) Complexes

The synthesis, photophysical and photochemical properties of tetra- and chlorotetrapoly(oxyethylene)-substituted oxotitanium(IV) phthalocyanines are reported for the first time. The new compounds were characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy, electronic spectroscopy and mass spectra. These complexes showed monomeric behaviour in solution. General trends are described for photodegredation, singlet oxygen, triplet state and fluorescence quantum yields, and triplet and fluorescence lifetimes of these compounds in dimethyl sulfoxide (DMSO). Photophysical and photochemical properties of phthalocyanine complexes are very useful for PDT applications. The complexes showed high triplet quantum yields and triplet lifetimes in DMSO. The singlet oxygen quantum yields (ΦΔ), which give an indication of the potential of the complexes as photosensitizers in applications where singlet oxygen is required (Type II mechanism), were 0.72 and 0.78 for 3a and 5a, respectively. Thus, these complexes show potential as Type II photosensitizers. These complexes were also quenched by benzoquinone for fluorescence quenching studies

Perceived organizational trust as an antecedent of organizational citizenship behaviour: Findings from lodging enterprises in turkey

© University of the Aegean.Two concepts that have just made their way into research on management of tourism enterprises are perceived organizational trust (POT) and organizational citizenship behaviour (OCB). Trust and citizenship behaviours of employees have become a central variable in regard to the well-being of organizations. Although the studies of these subjects have increased markedly in the past decade little effort has spotlighted on the relationship between POT and OCB from the point of tourism sector. Therefore in this study the relationship between POT and OCB is examined in Turkey with 412 participants. The analyses found support for 7 hypotheses, including support for a strong relationship between POT and OCB. Contrary to expectations, there were no significant differences between some dimensions of OCB and POT. By the help of findings it is expected to contribute to the theoretical studies in the field of tourism