The production of singlet oxygen was measured indirectly for three classes of photosensitizers: porphyrins (Photofrin II, TPPS4), chlorins (MACE, DACE), and a phthalocyanine (CASPc). Buffered solutions of sensitizers and singlet oxygen acceptors were irradiated with a CW dye laser and the oxygen depletion was monitored electrochemically with a Clark-type microelectrode. A comparison of oxygen-d...

To investigate the intracellular signaling mechanisms involved in the activation of APC by contact sensitizers, we studied the induction of tyrosine phosphorylation by these agents. Selective analysis of phosphotyrosine (p-tyr) in human Langerhans cells and different mononuclear cell types was achieved using a multicolor flow-cytometric technique. Stimulation with contact sensitizers revealed a...

The human Cell Line Activation Test (h-CLAT) is an in vitro skin sensitization test based on the enhancement by sensitizers of CD86 and/or CD54 expression on THP-1 cells. The aim of this study is to confirm the transferability and reproducibility of the h-CLAT protocol. Seven Japanese laboratories participated in this h-CLAT ring study. First, two well-known sensitizers (dinitrochlorobenzene (D...

Novel D–A-?-A organic sensitizers for DSSCs based on benzothiadiazole internal acceptor (A) and N -substituted indolines fused with cyclopentane or cyclohexane as donor (D) the best PCE of 5.8% were reported.

Two new truxene-based organic sensitizers (M15 and M16) featuring high extinction coefficients were synthesized for dye-sensitized solar cells employing cobalt electrolyte. The M16-sensitized device displays a 7.6% efficiency at an irradiation of AM1.5 full sunlight.

High extinction coefficients and easily tunable spectral properties of π conjugated donor-acceptor dyes are of superior advantage for the design of new metalfree organic sensitizers for applications in dye-sensitized solar cells. Ultrafast transient absorption spectroscopy on the femtosecond and nanosecond time scales provided deep insights into the dependence of charge carrier dynamics in full...

Abstract Design and development of near-infrared (NIR) dyes with strong binding on the TiO 2 surface is inevitable for realization dye-sensitized solar cells (DSSCs) improved efficiency stability. A series NIR bearing different anchoring groups have been designed considering their suitability as sensitizers DSSCs based-on iodine-based redox electrolytes. Under Gaussian program, density function...