Spectral properties of an indotricarbocyanine dye upon complexation with nanodiamonds in aqueous solutions were studied. Complexation was accompanied by disappearance of the H^*-aggregate absorption band at 514 nm and a bathochromic shift of long-wavelength absorption maxima from 706 to 718 nm. The dye emission spectrum was almost unchanged. The fluorescence excitation peak shifted from 706 to 710 nm. The dye carboxyl groups played an important role in the complexation of the dye to nanodiamonds based on an analysis of the IR absorption spectra. The complexes broke down and the dye molecules bonded to serum proteins in the presence of human blood serum. This was confirmed by significant increases in the fluorescence lifetime and anisotropy. The obtained complexes could be used as a basis for fluorescent biosensors.

中文翻译：

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爆轰纳米金刚石和血液血清蛋白络合的Indotricarbocyanine染料的光谱特性

研究了吲哚硼花青染料与纳米金刚石在水溶液中络合后的光谱性质。复杂性伴随着H ^*的消失-在514nm处的聚集吸收带和从706到718nm的长波长吸收最大值的红移。染料发射光谱几乎不变。荧光激发峰从706 nm移至710 nm。基于红外吸收光谱的分析，染料羧基在染料与纳米金刚石的络合中起重要作用。在人血清中，复合物分解，染料分子与血清蛋白结合。荧光寿命和各向异性的显着增加证实了这一点。所得配合物可用作荧光生物传感器的基础。