ABSORPTION AND FLUORESCENCE SPECTRA OF PHENYLBENZIMIDAZOLE SERIES COMPOUNDS

Two-photon absorption spectra of carotenoids compounds

In vivo action spectra, absorption and fluorescence excitation spectra of photosensitizers for photodynamic therapy.

Recently the importance of measuring in vivo action spectra for photodynamic therapy (PDT) with various photosensitizers was pointed out in this journal [1]. It was shown that the effect of PDT with zinc phthalocyanine tetrasulphonic acid (ZnPcS4) increases considerably when the wavelength of the activating light is increased from 680 to 692 nm. In this regard a further comparison with haematop...

SYNTHESIS AND ELECTRONIC ABSORPTION SPECTRA OF SOME METHOXY HALF-ANALOGUE OF MICHLER'S HYDROL BLUE

The present work comprises the synthesis of one series of diarylmethane dyes containing one or more terminal methoxy substituents together with a variable tertiary amino group. The electronic absorption spectra of the dyes have been determined. As the conjugation of the terminal nitrogen atom improves in the sequence NMez > Kairoline > Julolidine, a progressive hypsochromic shift is observed

Thermochromic Shifts of Absorption and Fluorescence Spectra and Excited State Dipole Moment of PRODAN*

PRODAN (Fig. 1) belongs to the category of solvent sensitive probes due to the fact that the aromatic naphthalene ring is attached to two groups: an electron donor and an electron acceptor which contribute to a distinct increase in the electric dipole moment A/u = /u,e-iug (/ie and is the dipole moment in the excited and ground state, respectively) as a result of excitation to the lowest excite...

extraction and characterization of allium irancum plant extract and its application in the green synthesis of silver nano particles and oxidation of thiocarbony1 compounds

سنتز سبز نانوذرات فلزی (nps) درسالهای اخیر توجه بسیارزیادی را به خود جلب کرده است. زیرا این پروتوکل کم هزینه وسازگار با محیط زیست از روش های استاندارد سنتز. در این پایان نامه ما گزارش میکنیم یک روش ساده و سازگار با محیط زیست برای سنتز نانوذرات نقره با استفاده از محلول آبی عصاره گیاه allium iranicum به عنوان یک عامل کاهش دهنده ی طبیعی. نانو ذرات نقره مشخص شد با استفاده از تکنیک های uv-visible، x...