In situ post-synthesis of luminescent Lewis acid-base adducts

作者：Ji, Sichao; Xue, Qin^*; Xie, Guohua^*

来源：Chemical Communications, 2023, 59(34): 5030-5038.

DOI：10.1039/d2cc06749h

• LIGHT
• LAYER
• FILMS

Inkjet printing has drawn widespread attention and is considered as one of the most promising technologies for mass manufacturing of optoelectronic devices. Herein, we elaborate a novel strategy to modulate the morphologies of inkjet-printed thin films by optimizing the ink formulation and suppressing the coffee-ring effect, combining the approach of in situ post-synthesis based on Lewis acid-base interactions. Luminescent Lewis acid-base adducts are created immediately during inkjet printing, i.e., in situ post-synthesis based on coordination chemistry. The electron-deficient aryl borane was employed as Lewis acid to trigger the coordination interaction with a Lewis base of a nitrogen-containing fluorescent material, which resulted in the rearrangement of the frontier molecular orbitals. Most likely, a reduced singlet-triplet energy gap and charge transfer would be detectable if the Lewis base is a conjugated fluorophore. This exemplifies the great potential of In situ post-synthesis strategy in the design of new luminescent materials for light-emitting diodes and encryption via inkjet printing.

• 单位
  厦门大学; 汕头大学; 武汉大学