نتایج جستجو برای: cyanine dyes
تعداد نتایج: 20475 فیلتر نتایج به سال:
New applications have recently led to an increased interest in near infrared (NIR) dyes. Both, strong NIR absorption and fluorescence emission are important phenomena. While fluorescence is exploited especially for labelling purposes in microscopy, NIR absorption has a broad range of applications mainly in material science. Examples of growing fields of interest are NIR light emitting diodes an...
Fluorescence lifetime (FLT) properties of organic molecules provide a new reporting strategy for molecular imaging in the near infrared (NIR) spectral region. Unfortunately, most of the NIR fluorescent dyes have short FLT typically clustered below 1.5 ns. In this study, we demonstrate that a new class of NIR fluorescent dyes, pyrrolopyrrole cyanine dyes, have exceptionally long FLTs ranging fro...
Highly stable and freestanding nanohybrid cerasome with non-covalently linked two J-aggregates of cyanine dyes was constructed as a model to advance conceptual understanding of excitation energy transfer and energy trapping in connection with photobiological processes.
A data anomaly was observed that affected the uniformity and reproducibility of fluorescent signal across DNA microarrays. Results from experimental sets designed to identify potential causes (from microarray production to array scanning) indicated that the anomaly was linked to a batch process; further work allowed us to localize the effect to the posthybridization array stringency washes. Ozo...
The time-dependent nature of the complexes of IR806 dye and other similar near-infrared cyanine dyes in human serum albumin (HSA) have been studied by employing absorption, emission and time-correlated single photon counting techniques. The complex formation of IR806 with HSA modifies the native structure of IR806, resulting in time-dependent changes in its optical properties. The modification ...
Novel, highly fluorescent, monofunctional, water-soluble heptamethine cyanine dyes containing a robust C-C bond at the central position of the near-infrared fluorophore system were prepared by the Suzuki-Miyaura method. The reaction proceeded efficiently to replace the meso-chlorine atom with a carboxy-functionalized aryl moiety and afforded the desired compounds in high yields. This methodolog...
In this paper, 2,3,3-trimethyl-3H-indolin was synthesized by phenylhydrazine and 3-methyl-2-butanone as raw materials in the acetic acid reacted with different nitrogenalkylating reagents. Semi mono-cyanine dye and semi dicyanine dye were prepared with the help of squaric acid diethyl ester. The spectral properties of the target products were checked. The results show that compared with symmetr...
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