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Novel up-conversion photoluminescent materials: noncoherent excitation by near-infrared sunlight†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1039/c8tc00026c Cheng Chen 1, 2, 3, 4, 5 , Ting Cao 1, 2, 3, 4, 5 , Lijian Liu 1, 2, 3, 4, 5
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1039/c8tc00026c Cheng Chen 1, 2, 3, 4, 5 , Ting Cao 1, 2, 3, 4, 5 , Lijian Liu 1, 2, 3, 4, 5
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Our synthesized oligomer (OCACP) can convert the near-infrared (NIR) region of sunlight into visible light with assistance from ultraviolet (UV) light, and the mechanism includes UV quantum cutting and NIR two-photon absorption. Here, we report a high conversion rate (ΦF = 0.4108) for a wavelength-focusing photoluminescent OCACP with densely grafted 2-pyrazoline that was prepared by free-radical polymerization of 3-carbethoxy-5-acrylatecarbethoxy-2-pyrazoline, a chromophore with good fluorescence (ΦF = 0.0171). After polymerization, the densely grafted 2-pyrazoline significantly increased the interaction between the pyrazoline ring and formed a propeller shape, and the intramolecular pyrazoline ring rotations were physically restricted, which restrained the non-radiative pathway and accelerated the radiative pathway. These factors collectively contributed to the excellent fluorescence performance of OCACP. Additionally, OCACP achieved good-quality live-cell imaging with an enhancement in the fluorescence intensity through two-wavelength excitation of the cell rather than increasing the dye dosage or laser power and improved the visible portion of sunlight for more efficient use of solar energy.
中文翻译：
新型上转换光致发光材料：近红外太阳光的非相干激发†
我们的合成低聚物（OCACP）可以借助紫外线（UV）将太阳光的近红外（NIR）区域转换为可见光，其机理包括UV量子切割和NIR双光子吸收。这里，我们报告一个高转化率（Φ ˚F用于与密集接枝2-吡唑啉的波长聚焦光致发光OCACP中，制备通过自由基聚合3-乙酯基-5- acrylatecarbethoxy -2-吡唑啉的，发色团= 0.4108）具有良好的荧光（Φ ˚F= 0.0171）。聚合后，致密接枝的2-吡唑啉显着增加了吡唑啉环之间的相互作用并形成了螺旋桨形状，并且分子内吡唑啉环的旋转受到物理限制，从而抑制了非辐射途径并加速了辐射途径。这些因素共同促进了OCACP的出色荧光性能。此外，OCACP通过对细胞进行两次波长激发而不是增加染料剂量或激光功率来提高荧光强度，从而获得了高质量的活细胞成像，并改善了阳光的可见部分，从而更有效地利用了太阳能。
更新日期：2018-03-08
中文翻译：
新型上转换光致发光材料：近红外太阳光的非相干激发†
我们的合成低聚物（OCACP）可以借助紫外线（UV）将太阳光的近红外（NIR）区域转换为可见光，其机理包括UV量子切割和NIR双光子吸收。这里，我们报告一个高转化率（Φ ˚F用于与密集接枝2-吡唑啉的波长聚焦光致发光OCACP中，制备通过自由基聚合3-乙酯基-5- acrylatecarbethoxy -2-吡唑啉的，发色团= 0.4108）具有良好的荧光（Φ ˚F= 0.0171）。聚合后，致密接枝的2-吡唑啉显着增加了吡唑啉环之间的相互作用并形成了螺旋桨形状，并且分子内吡唑啉环的旋转受到物理限制，从而抑制了非辐射途径并加速了辐射途径。这些因素共同促进了OCACP的出色荧光性能。此外，OCACP通过对细胞进行两次波长激发而不是增加染料剂量或激光功率来提高荧光强度，从而获得了高质量的活细胞成像，并改善了阳光的可见部分，从而更有效地利用了太阳能。
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