Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Ling Siu Choi"'
Publikováno v:
Optical Materials. 12:221-224
A technique has been established to determine the first hyperpolarizability value β of fluorescent molecules based on femtosecond hyper-Rayleigh scattering (HRS). The intrinsic high harmonic content of the femtosecond pulse train is used as a high f
Publikováno v:
Chemical Physics Letters. 293:337-342
The first hyperpolarizability β of a free hemicyanine dye and a homologue dye included in a supramolecular complex have been determined by hyper-Rayleigh scattering. Since the inclusion complex is fluorescent, high-frequency demodulation of the time
Publikováno v:
Thin Solid Films. :172-175
A novel supramolecular thin film in which a non-linear optical (NLO) chromophore is uniaxially included in the helical cavity of amylose, revealed a spontaneous self-assembly with a long-range polar order of the chromophores perpendicular to the film
Publikováno v:
Journal of the American Chemical Society. 120:1474-1478
Triple fluorescence is observed for 4-(N-1,4,8,11-tetraazacyclotetradecyl)benzonitrile (DMABN-Cyclam) in ethanol, corresponding to a locally excited (LE) singlet state, a twisted intramolecular cha...
Publikováno v:
Journal of Thermal Analysis. 46:1081-1092
The thermal properties of a dye molecule (guest) inside the cavity of a host amylose helix were studied by TGA, DSC, and Thermal Desorption MS. The results show that the degradation temperature of dye shifts to a higher temperature by approximately 2
Autor:
Ling-Siu Choi, Oh-Kil Kim
Publikováno v:
Langmuir. 10:2842-2846
Autor:
Oh Kil Kim, Ling Siu Choi
Publikováno v:
Langmuir. 10:57-60
Publikováno v:
Synthetic Metals. 59:59-70
Ladder-type polymeric transition metal(II) complexes based on 2,5-diamino-1,4-benzenedithiol (DADT) are synthesized. DADT is a unique ligand among S,N-donor ligand systems in that its metal complexes have a high conductivity, particularly the Co(II)
Autor:
G. E. Collins, Ling-Siu Choi
Publikováno v:
ChemInform. 28
A newly synthesized diaza crown ether, BPDC, demonstrates sensitivity to solvent polarity, microviscosity and metal complexation with spectroscopic changes in monomer and excimer fluorescence.
Autor:
Ling-Siu Choi, Oh-Kil Kim
Publikováno v:
Makromolekulare Chemie. Macromolecular Symposia. 39:203-207
A novel association of poly(acrylic acid) in dilute solution is induced by high shear flow, producing a rigid chain morphology via interchain H-bonding; the association is destroyed upon adding salt to the shearing solution. Such macromolecular chang