Gutiérrez M, Zhang Y, Tan JC. Confinement of Luminescent Guests in Metal–Organic Frameworks: Understanding Pathways from Synthesis and Multimodal Characterization to Potential Applications of LG@MOF Systems.
Chem Rev 2022;
122:10438-10483. [PMID:
35427119 PMCID:
PMC9185685 DOI:
10.1021/acs.chemrev.1c00980]
[Citation(s) in RCA: 54] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
![]()
This
review gives an authoritative, critical, and accessible overview
of an emergent class of fluorescent materials termed “LG@MOF”,
engineered from the nanoscale confinement of luminescent guests (LG)
in a metal–organic framework (MOF) host, realizing a myriad
of unconventional materials with fascinating photophysical and photochemical
properties. We begin by summarizing the synthetic methodologies and
design guidelines for representative LG@MOF systems, where the major
types of fluorescent guest encompass organic dyes, metal ions, metal
complexes, metal nanoclusters, quantum dots, and hybrid perovskites.
Subsequently, we discuss the methods for characterizing the resultant
guest–host structures, guest loading, photophysical properties,
and review local-scale techniques recently employed to elucidate guest
positions. A special emphasis is paid to the pros and cons of the
various methods in the context of LG@MOF. In the following section,
we provide a brief tutorial on the basic guest–host phenomena,
focusing on the excited state events and nanoscale confinement effects
underpinning the exceptional behavior of LG@MOF systems. The review
finally culminates in the most striking applications of LG@MOF materials,
particularly the “turn-on” type fluorochromic chemo-
and mechano-sensors, noninvasive thermometry and optical pH sensors,
electroluminescence, and innovative security devices. This review
offers a comprehensive coverage of general interest to the multidisciplinary
materials community to stimulate frontier research in the vibrant
sector of light-emitting MOF composite systems.
Collapse