Cluster-Mediated Nucleation and Growth of J- and H-Type Polymorphs of Difluoroboron Avobenzone for Organic Microribbon Lasers,ACS Nano

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Cluster-Mediated Nucleation and Growth of J- and H-Type Polymorphs of Difluoroboron Avobenzone for Organic Microribbon Lasers
ACS Nano ( IF 15.8 ) Pub Date : 2018-04-26 00:00:00 , DOI: 10.1021/acsnano.8b00150
Qing Liao ₁ , Xin Guo Wang ₁ , Shaokai Lv ₁ , Zhenzhen Xu ₁ , Yi Zhang ₂ , Hongbing Fu _{1,

3}

Affiliation

Controlled fabrication of organic polymorphisms with well-defined dimensions and tunable luminescent properties plays an important role in developing optoelectronic devices, sensors, and biolabeling agents but remains a challenge due to the weak intermolecular interactions among organic molecules. Herein, we developed a two-step solution self-assembly method for the controlled preparation of blue-emissive or green-emissive microribbons (MRs) of difluoroboron avobenzone (BF₂AVB) by adjusting the cluster-mediated nucleation and subsequent one-dimensional growth processes. We found that blue-emissive MRs belong to the monoclinic phase, in which BF₂AVB molecules form slipped π-stacks, resulting in J-aggregates with the solid-state photoluminescence efficiency φ = 68%. Meanwhile, green-emissive MRs are ascribed to the orthorhombic phase and exhibit cofacial π-stacks, which lead to H-aggregates with φ = 24%. Furthermore, these as-prepared MRs can both act as polymorph-dependent Fabry–Pérot resonators for lasing oscillators. The strategy described here might offer significant promise for the coherent light source of optoelectronic devices.

中文翻译：

簇介导的二氟硼阿伏苯宗J型和H型多晶型物的成核和生长。

具有确定的尺寸和可调节的发光特性的有机多态性的受控制备在开发光电器件，传感器和生物标记剂中起着重要作用，但由于有机分子之间的分子间相互作用较弱，因此仍然是一个挑战。在本文中，我们通过调整簇介导的成核作用和随后的一维生长，开发了一种两步溶液自组装方法，用于控制制备二氟硼阿伏苯宗（BF ₂ AVB）的蓝色或绿色发射微带（MR）。流程。我们发现蓝色发射MR属于单斜相，其中BF ₂AVB分子形成滑动的π堆栈，导致J聚集体的固态光致发光效率为φ= 68％。同时，绿色发射MR被归为正交相，并表现出π堆栈，这导致φ= 24％的H聚集。此外，这些准备好的MR都可以作为依赖于多晶型的Fabry-Pérot谐振器，用作激光振荡器。此处描述的策略可能为光电设备的相干光源提供重要的前景。

更新日期：2018-04-26

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