scholarly journals Bioconjugatable, PEGylated hydroporphyrins for photochemistry and photomedicine. Narrow-band, red-emitting chlorins

2016 ◽  
Vol 40 (9) ◽  
pp. 7721-7740 ◽  
Author(s):  
Mengran Liu ◽  
Chih-Yuan Chen ◽  
Amit Kumar Mandal ◽  
Vanampally Chandrashaker ◽  
Rosemary B. Evans-Storms ◽  
...  
Keyword(s):  
Spectral Region ◽  
Narrow Band ◽  
Fluorescence Band ◽  
Near Ultraviolet

PEGylated chlorins are soluble in water, can be excited in the near-ultraviolet, and exhibit a relatively narrow fluorescence band in the red spectral region.

scholarly journals Bioconjugatable, PEGylated hydroporphyrins for photochemistry and photomedicine. Narrow-band, near-infrared-emitting bacteriochlorins

2016 ◽  
Vol 40 (9) ◽  
pp. 7750-7767 ◽  
Author(s):  
Nuonuo Zhang ◽  
Jianbing Jiang ◽  
Mengran Liu ◽  
Masahiko Taniguchi ◽  
Amit Kumar Mandal ◽  
...  
Keyword(s):  
Spectral Region ◽  
Near Infrared ◽  
Narrow Band ◽  
Fluorescence Band

PEGylated bacteriochlorins are soluble in water, can be excited in the ultraviolet, and exhibit a narrow fluorescence band in the NIR spectral region.

Argon Matrix Infrared Spectroscopic Evidence for the Generation of Pentatetraenone by Flash Pyrolysis of Suitable Precursors

1988 ◽  
Vol 41 (2) ◽  
pp. 225 ◽  
Author(s):  
RFC Brown ◽  
KJ Coulston ◽  
FW Eastwood ◽  
MJ Irvine ◽  
ADE Pullin
Keyword(s):  
Carbon Atom ◽  
Infrared Spectra ◽  
Spectral Region ◽  
Narrow Band ◽  
Broad Band ◽  
Carbonyl Carbon Atom ◽  
Carbonyl Carbon ◽  
Argon Matrix ◽  
Spectroscopic Evidence ◽  
Argon Mixture

Five compounds were investigated as precursors for the pyrolytic generation of pentatetraenone, H2C=C=C=C=C=O. These were (1)-(4): 3- ethenylidenebicyclo [2.2.1]hept-5-ene with the following 2,2 substituents : H, COOCOCF3 (1); H, 13COOCOCF3 (1′); (COOCOCF3)2 (2); (COO)2C(CH3)(OCH3) (3); (COO)2Si(CH3)2 (4) and 5-(3′- methylenebicyclo [2.2.1]hept-5′-en-2′-ylidene)-2,2-dimethyl-1,3-dioxan-4,6-dione (5). The five precursors were pyrolysed in a stream of argon at temperatures in the range 350-725°C and the pyrolysate -argon mixture condensed on a CsI plate at c. 10 K. Infrared spectra were obtained between 4000 and 250 cm-1. All five precursors gave two strong bands in the spectral region 2070-2250 cm-1, possibly attributable to pentatetraenone. At lower pyrolytic temperatures the more intense of the two bands was a broad band centred at c. 2128 cm-1 [precursors (1)- (4)] or at c. 2094 cm-1 [precursor (5)]. At higher pyrolytic temperatures these bands were diminished in intensity and replaced by a narrow band at 2207 cm-1 for all five precursors. Bands due to the expected other products for each pyrolysis reaction to form pentatetraenone were observed. H2C413CO ( pentatetraenone substituted by 13C at the carbonyl carbon atom) was prepared by pyrolysis of precursor (1′). We assign the broad bands at c. 2128 cm-1 [precursors (1)-(4)] and at c. 2094 [precursor (5)] to incompletely pyrolysed precursor in which cyclopentadiene has been retained but decomposition in the rest of the molecule has resulted in formation of a =C=C=O group. Bands at 2207, 2068 and 1726 cm-1 we assign to v2-v4 of pentatetraenone. Corresponding bands at 2168, 2056 and 1720 cm-1 are observed in the spectrum of H2C413CO.

scholarly journals Fabrication of perfect plasmonic absorbers for blue and near-ultraviolet lights using double-layer wire-grid structures

2021 ◽  
Author(s):  
Atsushi Motogaito ◽  
Ryoga Tanaka ◽  
Kazumasa Hiramatsu
Keyword(s):  
Double Layer ◽  
Short Wavelength ◽  
Narrow Band ◽  
Maximum Absorption ◽  
Electromagnetic Spectrum ◽  
Wave Analysis ◽  
Wire Grid ◽  
Rigorous Coupled Wave Analysis ◽  
Near Ultraviolet ◽  
Rigorous Coupled Wave

Abstract This study proposes using double-layer wire-grid structures to create narrow-band, perfect plasmonic absorbers, which depend on polarization, for the short-wavelength visible and near-ultraviolet regions of the electromagnetic spectrum. A rigorous coupled-wave analysis reveals that the maximum absorption attained using Ag and Al is ~90% at 450 nm and 375 nm. Experiments using Ag yielded results similar to those predicted by simulations. These results demonstrate that narrow-band perfect plasmonic absorbers, which depend on the polarization, can be realized at 450 nm and 375 nm using Ag or Al.

ENERGY LEVELS OF TRIARYLMETHYL CARBONIUM IONS

1964 ◽  
Vol 42 (4) ◽  
pp. 810-817 ◽  
Author(s):  
E. K. Ng ◽  
F. C. Adam
Keyword(s):  
Molecular Orbital ◽  
Energy Levels ◽  
Fluorescence Band ◽  
Molecular Orbital Calculations ◽  
Structure Representation ◽  
Near Ultraviolet ◽  
Carbonium Ions ◽  
Visible Spectra ◽  
Made In

The near ultraviolet and visible spectra of the various phenyl-, p-biphenyl methyl carbonium ions have been investigated and the polarization of the absorptions relative to the fluorescence band have been determined. An assignment of the transitions is made, using as a basis simple molecular orbital calculations and the expectations based on the structure representation. These are compared to the assignments made in earlier researches. The calculated intensities are found to agree favorably with the observed values.

Visualization of Radioactive Sources Without Gamma-Radiation With UV Imaging Systems

2009 ◽  
Author(s):  
Oleg Ivanov ◽  
Alexey Danilovich ◽  
Vyacheslav Stepanov ◽  
Sergey Smirnov ◽  
Anatoly Volkovich
Keyword(s):  
Gamma Radiation ◽  
Spectral Region ◽  
Imaging Systems ◽  
Measurement Time ◽  
Moving Targets ◽  
Atmospheric Air ◽  
Output Image ◽  
Uv Imaging ◽  
Near Ultraviolet ◽  
Ultraviolet Wavelength

New UV cameras are suitable for imaging of α-contamination by fluorescence of atmospheric air the near ultraviolet (wavelength — 280 – 390 nm) region. Their parameters are: FOV for detecting in UV spectral region is 8° × 6°. The optical FOV is about 48° × 36°. DayCor SUPERB UV camera has sensitivity 3×10−18 W/cm2 enables detection and displaying corona emission as weak as 1.5 pC at distance 8 m, and capture moving targets without smearing the output image. Instruments sensitivity for alpha contamination registration in terms of minimum measurable activities (MMA) have been estimated as, 40–100 Bq/cm2 (measurement time is 3600–600 sec correspondently).

Narrow band X-ray emission in the water-window spectral region from a laser heated gold copper mix-Z plasma

2006 ◽  
Vol 86 (3) ◽  
pp. 519-522 ◽  
Author(s):  
J.A. Chakera ◽  
S.R. Kumbhare ◽  
P.A. Naik ◽  
P.D. Gupta
Keyword(s):  
Spectral Region ◽  
Narrow Band ◽  
X Ray ◽  
Water Window ◽  
Laser Heated
Sign in / Sign up

Export Citation Format

Share Document