Synthesis of the novel hydrazone based ligands (L1–L3) and their borondifluoride (BF₂) complexes (BODIHYs; B1–B3) have been described. The ligands and BODIHYs have been thoroughly characterized by spectroscopic studies (¹H NMR, ¹³C NMR, ¹¹B NMR, ¹⁹F NMR, ESI–MS, UV–vis and fluorescence) and structures of L1, L2 and B1–B3 determined by X–ray single crystal analyses. Emission behaviour of these compounds in solution and solid state have been fine tuned by varying the σ–spacers (–O, –S and –SO₂). Vital role of various interactions in aggregation induced emission (AIE; B1 and B2), aggregation caused quenching (ACQ; B3) and reversible mechanochromism (B1–B3) have been rationalized by X-ray single crystal analyses. Dual emission band (~484 and 550 nm) for B3 have been attributed to the involvement of the intra-/and intermolecular charge transfer processes. The observed hypsochromic shift in these luminophores (upon grinding) successfully reverted back upon exposure to dichloromethane (CH₂Cl₂). An analysis of the powder X–ray diffraction (PXRD) pattern, before and after grinding advocated alteration of prevailing crystal packing by the external force as it rescinds the weak intra-/and intermolecular interactions of the molecule.

已经描述了基于的新型配体（L1-L3）及其二氟化硼（BF ₂）配合物（BODIHYs; B1 - B3）的合成。通过光谱研究（¹ H NMR，¹³ C NMR，¹¹ B NMR，¹⁹ F NMR，ESI–MS，UV-vis和荧光）和L1，L2和B1 - B3的结构，对配体和BODIHY进行了彻底表征。 X射线单晶分析。这些化合物在溶液和固态下的发射行为已通过改变σ-间隔物（-O，-S和-SO ₂）。X射线单晶分析已合理化了各种相互作用在聚集诱导发射（AIE；B1和B2），聚集引起的猝灭（ACQ；B3）和可逆机械变色（B1-B3）中的重要作用。B3的双发射带（〜484和550 nm）已归因于分子内/分子间电荷转移过程的参与。在暴露于二氯甲烷（CH ₂ Cl ₂）后，观察到的这些发光体的七色转变（研磨后）成功恢复了原样。）。粉末X射线衍射（PXRD）模式的分析，在研磨前后都主张通过外力改变主要的晶体堆积，因为它消除了分子内/分子间的弱相互作用。