Abstract
Luminescent solids have unique optical properties. An important goal is
to realize a simple procedure to lighten up weakly emissive hybrid
inorganic-organic solids. Here we demonstrate that the instant mixing of
(1-cyano-2-[α-terthiophen-2-yl]-vinyl)carboxylic acid (3TCC) with
the metal-organic framework MOF-177 in an organic solvent followed by
the evaporation of that solvent conceived solids with distinct
photoluminescence (PL) properties, turning over the PL quantum yields
(PLQY) of the generated 3TCC@MOF-177 solids by ~2 to 40
folds compared to the 3TCC solution. The anisotropic rotational times of
3TCC@MOF-177 solids (e.g., 0.14, 0.41, and 0.51 ns) inversely correlate
with their PLQY values (e.g., 65, 42, and 32%) depending on the protic
solvent used in the initial preparation step in the following order:
methanol>ethanol>butanol. The behavior is
explained kinetically and thermodynamically. These observations offer
new solid with a remarkable PLQY that was easily achieved using an
effortless approach.