TY - JOUR
T1 - A multi-responsive system based on intramolecular B ← O = P Lewis acid-base pairs
AU - Wang, Yu
AU - Liu, Kanglei
AU - Chen, Bangkuan
AU - Yin, Xiaodong
AU - Peng, Tai
AU - Iqbal, Javed
AU - Wang, Nan
N1 - Publisher Copyright:
© 2022 The Royal Society of Chemistry.
PY - 2022/7/11
Y1 - 2022/7/11
N2 - A series of amino-triarylborane based flexible Lewis pairs with P(O)R2 (R = phenyl, methylphenyl) and BR2 (R = 2,4,6-trimethylphenyl (Mes), 2,6-dimethyl-4-methoxyphenyl (Mes(OMe)) were synthesized and fully characterized. These compounds display distinct responses toward multiple external stimuli including solvent, temperature and pressure. A detailed study shows that the ability of reversible switching between the open and closed structures based on the intramolecular B ← O bond plays a key role in their solution state fluorescence response to external stimuli, which can be further tuned by adjusting the electronic/steric properties of the substituents on the BR2/P(O)R2 unit. All these compounds exhibit remarkable mechanochromism. Furthermore, upon grinding, pressure-induced blue-shifted and red-shifted emissions were observed for B2/B3 and B1/B4, respectively. This solid state emission change is fully reversible for B2-B4 upon exposure to vapours of several common solvents.
AB - A series of amino-triarylborane based flexible Lewis pairs with P(O)R2 (R = phenyl, methylphenyl) and BR2 (R = 2,4,6-trimethylphenyl (Mes), 2,6-dimethyl-4-methoxyphenyl (Mes(OMe)) were synthesized and fully characterized. These compounds display distinct responses toward multiple external stimuli including solvent, temperature and pressure. A detailed study shows that the ability of reversible switching between the open and closed structures based on the intramolecular B ← O bond plays a key role in their solution state fluorescence response to external stimuli, which can be further tuned by adjusting the electronic/steric properties of the substituents on the BR2/P(O)R2 unit. All these compounds exhibit remarkable mechanochromism. Furthermore, upon grinding, pressure-induced blue-shifted and red-shifted emissions were observed for B2/B3 and B1/B4, respectively. This solid state emission change is fully reversible for B2-B4 upon exposure to vapours of several common solvents.
UR - https://www.scopus.com/pages/publications/85135112772
U2 - 10.1039/d2tc01999j
DO - 10.1039/d2tc01999j
M3 - Article
AN - SCOPUS:85135112772
SN - 2050-7526
VL - 10
SP - 10981
EP - 10987
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 30
ER -