Multicomponent Platinum(II) Cages with Tunable Emission and Amino Acid Sensing.
The syntheses, characterization, and emission properties of three tetragonal prismatic cages, 4a-4c, constructed from eight 90° Pt(II) acceptors, four linear dipyridyl ligands, and two tetraphenylethene (TPE)-based sodium benzoate ligands, are described. These cages are emissive in dilute solutions due to the metal-coordination-induced partial restriction of intramolecular rotation of their TPE units, while the dipyridyl moieties, which act as the pillars as well as the solvents, strongly influence these emissions. Specifically, cages 4a and 4b, bearing a 4,4'-dipyridine and a 1,2-di(4-pyridyl)ethylene as their pillar parts, respectively, display good emissions in common organic solvents at 485-493 nm that are derived from the TPE units. In contrast, cage 4c, with its BODIPY-based dipyridyl unit, exhibits two emission bands at 462-473 and 540-545 nm, originating from the TPE and BODIPY fluorophores, respectively. Moreover, cage 4b has been employed as a turn-on fluorescent sensor for thiol-containing amino acids via a self-destructive reaction, while the cage can also be regenerated via the addition of Pt(II) acceptors. The studies described herein not only enrich the ongoing research on fluorescent materials but also pave the way to prepare stimuli-responsive supramolecular coordination complexes.
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
Mingming
http://orcid.org/0000-0003-3156-7811
M
Zhang
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
Manik Lal
http://orcid.org/0000-0003-2242-3007
ML
Saha
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun, Jilin 130012, P. R. China.
Ming
http://orcid.org/0000-0002-5332-0804
M
Wang
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
Zhixuan
http://orcid.org/0000-0001-8295-5860
Z
Zhou
Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States.
Bo
http://orcid.org/0000-0002-4337-848X
B
Song
College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou 310036, P. R. China.
Chenjie
http://orcid.org/0000-0002-3000-1835
C
Lu
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
Xuzhou
X
Yan
Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States.
Xiaopeng
http://orcid.org/0000-0001-9655-9551
X
Li
State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China.
Feihe
http://orcid.org/0000-0003-3177-6744
F
Huang
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.|College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou 310036, P. R. China.
Shouchun
http://orcid.org/0000-0003-1086-1755
S
Yin
Department of Chemistry, University of Utah , 315 South 1400 East, Room 2020, Salt Lake City, Utah 84112, United States.
Peter J
http://orcid.org/0000-0002-2307-0576
PJ
Stang