Fluorescence properties of near-infrared tricarbocyanine dyes bound to double-stranded DNA

1995 ◽  
Author(s):  
Steven A. Soper ◽  
Yolanda Y. Davidson ◽  
Bonnie M. Gunn
Keyword(s):  
Near Infrared ◽  
Fluorescence Properties ◽  
Double Stranded Dna

Optical Absorption Spectroscopy of DNA-Wrapped HiPco Carbon Nanotubes

2019 ◽  
Vol 943 ◽  
pp. 95-99
Author(s):  
Li Jun Wang ◽  
Kazuo Umemura
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Optical Absorption ◽  
Absorption Spectroscopy ◽  
Near Infrared ◽  
Nir Spectroscopy ◽  
Optical Characterization ◽  
Optical Absorption Spectroscopy ◽  
Double Stranded Dna

Optical absorption spectroscopy provides evidence for individually dispersed carbon nanotubes. A common method to disperse SWCNTs into aqueous solution is to sonicate the mixture in the presence of a double-stranded DNA (dsDNA). In this paper, optical characterization of dsDNA-wrapped HiPco carbon nanotubes (dsDNA-SWCNT) was carried out using near infrared (NIR) spectroscopy and photoluminescence (PL) experiments. The findings suggest that SWCNT dispersion is very good in the environment of DNA existing. Additionally, its dispersion depends on dsDNA concentration.

Synthesis and Fluorescence Properties of Chiral Near-Infrared Emissive Polymers Incorporating BODIPY Derivatives and (S)-Binaphthyl

2012 ◽  
Vol 213 (21) ◽  
pp. 2238-2245 ◽  
Author(s):  
Yuanzhao Wu ◽  
Xuerong Mao ◽  
Xiao Ma ◽  
Xiaobo Huang ◽  
Yixiang Cheng ◽  
...  
Keyword(s):  
Near Infrared ◽  
Fluorescence Properties

scholarly journals Enhancement of fluorescent properties of near-infrared dyes using clickable oligoglycerol dendrons

2015 ◽  
Vol 13 (16) ◽  
pp. 4727-4732 ◽  
Author(s):  
Orit Redy-Keisar ◽  
Katharina Huth ◽  
Uwe Vogel ◽  
Bernd Lepenies ◽  
Peter H. Seeberger ◽  
...  
Keyword(s):  
Near Infrared ◽  
Fluorescence Properties ◽  
Aggregate Formation ◽  
Fluorescent Properties ◽  
Solubility In Water ◽  
Nir Dye

Oligoglycerol dendrons effectively enhance the fluorescence properties of a cyanine NIR dye by increasing the solubility in water and the prevention of aggregate formation.

Broad near-infrared fluorescence properties of Nd-doped PbClF crystals

2012 ◽  
Vol 47 (5) ◽  
pp. 585-590 ◽  
Author(s):  
Qingguo Wang ◽  
Liangbi Su ◽  
Hongjun Li ◽  
Lihe Zheng ◽  
Xiaodong Xu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Fluorescence Properties ◽  
Near Infrared Fluorescence

Synthesis and fluorescence properties of red to near-infrared emitting push-pull dyes based on benzodioxazole scaffolds

2021 ◽  
Author(s):  
Hongyan Sun ◽  
Liu Yang ◽  
Suyuan Chen ◽  
Dong Yi ◽  
Qingxin Chen ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Near Infrared ◽  
Fluorescent Imaging ◽  
Living Systems ◽  
Fluorescence Properties ◽  
Biological Processes ◽  
Temporal And Spatial

Fluorescent imaging with high temporal and spatial resolution has emerged as one of the most promising strategies to monitor biomolecules and biological processes in living systems. Among many kinds of...

Spectroscopic and Binding Properties of Near-Infrared Tricarbocyanine Dyes to Double-Stranded DNA

1996 ◽  
Vol 50 (2) ◽  
pp. 211-221 ◽  
Author(s):  
Yolanda Y. Davidson ◽  
Bonnie M. Gunn ◽  
Steven A. Soper
Keyword(s):  
Near Infrared ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Spectroscopic Properties ◽  
Fluorescence Emission Spectra ◽  
State Aggregation ◽  
Double Stranded Dna ◽  
Multiple Binding Sites ◽  
Multiple Binding ◽  
Spectrophotometric Titrations

The noncovalent binding and spectroscopic properties of several near-infrared tricarbocyanine dyes with respect to sonicated calf-thymus DNA are reported. The dyes investigated were diethylthiatricarbocyanine iodide (DTTCI), diethyloxatricarbocyanine iodide (DOTCI), and 1,1',3,3,3',3'-hexamethylindotricarbocyanine iodide (HITCI), which are cationic and possess absorption maxima at 772, 695, and 750 nm, respectively, in DMSO. In buffered aqueous solutions, these dyes demonstrated extensive ground-state aggregation in aqueous solvents when compared to DMSO. In the presence of double-stranded DNA (dsDNA), the fluorescence emission spectra revealed enhancement ratios of bound-to-free dye ranging from 4.5 for DOTCI to 128 for DTTCI. Spectrophotometric titrations and Scatchard analyses of the dye-dsDNA complexes yielded nonlinear plots, suggestive of possible multiple binding sites on the DNA. Viscometric titrations of the complexes showed increased solution viscosities for DTTCI, consistent with an unraveling and lengthening of the dsDNA upon complexation. Fluorescence lifetime data of the dye-dsDNA complexes showed longer lifetimes exhibited by these dyes in the presence of the dsDNA compared with those in solutions with no DNA.

scholarly journals Antioxidant potential of tea assessed by optical absorption spectroscopy in DNA-encased carbon nanotubes

2021 ◽  
Vol 39 (No. 1) ◽  
pp. 23-28
Author(s):  
Lijun Wang ◽  
Shusuke Oura ◽  
Yongbo Wu
Keyword(s):  
Near Infrared ◽  
High Selectivity ◽  
Antioxidant Potential ◽  
Optical Absorption Spectroscopy ◽  
Simple Method ◽  
Force Microscopy ◽  
Double Stranded Dna ◽  
Atomic Force ◽  
Simple Detection ◽  
Antioxidant Effects

It is essential to develop a simple method to assess food quality quantitatively. Available methods primarily rely on nanotechnology and offer high selectivity and sensitivity. In this study, we aimed to develop a sensitive nanoprobe, and, to this end, a double-stranded DNA-encased HiPco carbon nanotube (dsDNA-HiPco) hybrid was prepared and used to evaluate the antioxidant potential of a Chinese tea against hydrogen peroxide (H2O2) with a range of irradiation wavelengths. The morphology and dispersion of the hybrids were analysed using atomic force microscopy, which showed that dsDNA wrapped on the SWCNT surface well and homogeneous dispersion of the rod-shaped tubes while the concentration of dsDNA was 1 mg mL–1. The antioxidant effect of Chinese tea was evaluated by using near-infrared absorption and photoluminescence of the hybrid. Experimental results revealed that the tea exerted excellent antioxidant effects when the hybrid was pre-treated with 0.03% wt H2O2. Catechin present in the Chinese tea played a pivotal role in exerting the antioxidant effects. Therefore, a simple detection method proposed herein can be successfully applied in various fields, including biology, medicine, and the food industry.

Sign in / Sign up

Export Citation Format

Share Document