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Nanoscale Metal–Organic Frameworks and Metal–Organic Layers with Two-Photon-Excited Fluorescence by Xuefu Hu; Zhiye Wang; Yuming Su; Peican Chen; Jiawei Chen; Cankun Zhang; Cheng Wang is a Chemistry article available to read on EtoBox.

What is Nanoscale Metal–Organic Frameworks and Metal–Organic Layers with Two-Photon-Excited Fluorescence about?

Metal-organic frameworks (MOFs) based on 9,10-diphenylanthracene-derived ligands had been reported to exhibit upconverted fluorescence through triplet-triplet annihilation. We found that zirconium MOFs based on 9,10-diphenylanthracene can also give upconverted fluorescence via two-photon absorption without adding a triplet photosensitizer when a femtosecond pulsed laser is used as the excitation source. By tuning the synthetic condition, we obtained nanoscale MOFs of UiO structure in both octahedral and hexagonal nanoplate shapes, as well as a hexagonal nanoplate of MOFs of hcp-UiO structure and two-dimensional metal-organic layers. All of them, as well as a homogeneous solution of the 9,10-diphenylanthracene ligand, exhibit upconverted fluorescence upon excitation using a laser pulse of 60 fs with a pulse energy of ∼1.1 × 10 nJ/cm (unfocused). Moreover, we observed different emission spectra by two-photon excitation compared to those by one-photon excitation, which indicates access to a unique initial excited state via two-photon excitation. This phenomenon is not observed for a homogeneous solution of the ligand. These nanoscale MOFs may find application in two-photon fluorescenc

Who reads Nanoscale Metal–Organic Frameworks and Metal–Organic Layers with Two-Photon-Excited Fluorescence?

Author

Xuefu Hu; Zhiye Wang; Yuming Su; Peican Chen; Jiawei Chen; Cankun Zhang; Cheng Wang

Publisher

American Chemical Society; American Chemical Society (ACS) (ISSN 0020-1669)

Published

2020

Language

EN

Field

Chemistry (Physical Sciences)