Photo-thermo-induced room-temperature phosphorescence through solid-state molecular motion.
Photo-thermo-induced room-temperature phosphorescence through solid-state molecular motion.
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通过固态分子运动光热诱导室温磷光
DOI：
10.1038/s41467-022-31481-3
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发表时间：
2022-07-06
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
智能响应材料的开发，特别是具有非侵入性、快速响应磷光的那些，是非常期望的，但很少被描述。在此，我们设计并制备了一系列含有三嗪核和三个溴联苯单元的分子转子：o-Br-TRZ，m-Br-TRZ和p-Br-TRZ。溴和三嗪部分作为室温磷光活性单元，溴联苯单元作为转子驱动分子内旋转。当用强紫外光照射时，o-Br-TRZ、m-Br-TRZ和p-Br-TRZ的分子内旋转增加，相继通过分子运动产生光热效应。令人印象深刻的是，p-Br-TRZ达到的光热温度高达102 °C，并且由于分子运动后的有序分子排列而同步触发其磷光。预期热效应对于触发有效磷光是重要的，并且光子输入对于提供精确和非侵入性刺激是重要的。这种顺序的光-热-磷光转换有望在没有化学物质侵入的情况下解锁新的刺激响应磷光材料。非侵入性的，快速响应的磷光的发展是非常可取的，但很少被描述。在此，作者设计并制备了一系列的分子转子含有一个室温磷光活性三嗪核心和三个溴联苯单元作为转子，并展示了光刺激触发磷光。
The development of smart-responsive materials, in particular those with non-invasive, rapid responsive phosphorescence, is highly desirable but has rarely been described. Herein, we designed and prepared a series of molecular rotors containing a triazine core and three bromobiphenyl units: o-Br-TRZ, m-Br-TRZ, and p-Br-TRZ. The bromine and triazine moieties serve as room temperature phosphorescence-active units, and the bromobiphenyl units serve as rotors to drive intramolecular rotation. When irradiated with strong ultraviolet photoirradiation, intramolecular rotations of o-Br-TRZ, m-Br-TRZ, and p-Br-TRZ increase, successively resulting in a photothermal effect via molecular motions. Impressively, the photothermal temperature attained by p-Br-TRZ is as high as 102 °C, and synchronously triggers its phosphorescence due to the ordered molecular arrangement after molecular motion. The thermal effect is expected to be important for triggering efficient phosphorescence, and the photon input for providing a precise and non-invasive stimulus. Such sequential photo-thermo-phosphorescence conversion is anticipated to unlock a new stimulus-responsive phosphorescence material without chemicals invasion. The development of non-invasive, rapid responsive phosphorescence is highly desirable but has rarely been described. Herein, the authors designed and prepare a series of molecular rotors containing a room temperature phosphorescence active triazine core and three bromobiphenyl units acting as rotors and demonstrate light stimulus triggered phosphorescence.
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