High-efficiency luminescent organic–inorganic hybrid manganese(ii) halides applied to X-ray imaging

Abstract

Organic-inorganic hybrid manganese halides with low cost, facile synthesis, and high-efficient luminescence have emerged as the novel candidate materials for X-ray detection and imaging. In this work, a series of...

Two Organic–Inorganic Manganese(II) Halide Hybrids Showing Compelling Photo- and Mechanoluminescence as well as Rewritable Anticounterfeiting Printing

“…The weight loss from 580 to 983 K is about 74% for 1 , whereas that from 573 to 750 K is about 71.2% for 2 , which is attributed to the loss of organic cations and chloride atoms (calculation: 68.6% for both 1 and 2 ). The decomposition temperatures of 1 and 2 are comparable to those of other OIMHs. , DSC measurements revealed that the exothermic peaks appeared at 499 and 512 K for 1 and 2 , respectively, with the increase of temperature (Figure S3c,d), indicating that they have a high phase transition temperature.…”

Red‐Emitting Organic–Inorganic Hybrid Manganese(II) Halides for X‐Ray Imaging

“…It is related to the de-excitation of Mn 2+ 4 T 1 ( 4 G) to 6 76%, which is higher than that of other reported 0D Mn(II)-based hybrid scintillators, such as 59.4% for (C 5 H 6 N) 2 MnBr 4 [42] and 60.3% for TEA 2 MnI 4 . [46] Previously reported red-emitting Mn(II) halides with Mn-Mn distance <5 Å, such as CsMnBr 3 [32] and C 4 H 10 NMnBr 3 , [47] have a strong concentration quenching effect, resulting in a low PLQY with a nanosecond decay. In this case, the large Mn-Mn distance of ≈8.551 Å between adjacent trimeric [Mn 3 Cl 12 ] 6− prevents energy migration due to effective separation of Mn 2+ luminescence center, reducing the nonradiative energy dissipation, thereby leading to a long decay time of 1.7 ms and a high PLQY of 75.7%.…”

“…Most of the recent developed Mn(II)‐based hybrids are tetrahedrally green emission, such as (C 38 H 34 P 2 )MnBr 4 , [ 27 ] (ETP) 2 MnBr 4 , [ 31 ] and (C 22 H 22 O 2 P) 2 MnBr 4 . [ 32 ] Compared to the green‐emitting Mn‐based halides, the octahedrally coordinated red‐emitting counterparts possessing larger Stokes shift and higher PLQY are rarely studied. For instance, Yang Yang et al reported a one‐dimensional (1D) C 4 H 12 NMnCl 3 with octahedrally coordinated field showed higher PLQY (91.8% vs 85.1%) and higher steady‐state light yields (50 500 photons MeV −1 vs 24 400 photons MeV −1 ) than tetrahedrally coordinated 0D (C 8 H 20 N) 2 MnBr 4 .…”

Chiral hybrid manganese(ii) halide clusters with circularly polarized luminescence for X-ray imaging

“…Due to the advantages of eco-friendliness, low cost and high luminescence quantum efficiency, manganese(II) halides can be used for promising and efficient luminescent materials. [23][24][25][26] Their luminescence mechanism comes from the d orbital electron transition in the crystal field. [27][28][29] At present, manganesebased hybrid halides are widely used in light-emitting diodes, solar cells, photoelectric detection and other fields.…”