Unprecedented 30 K hysteresis across switchable dielectric and magnetic properties in a bright luminescent organic–inorganic halide (CH6N3)2MnCl4

Sen, Abhijit; Swain, Diptikanta; Row, Tayur N. Guru; Sundaresan, A.

doi:10.1039/c9tc00663j

Cited by 41 publications

(30 citation statements)

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“…A 1 (S)) of four coordinated [MnBr 4 ] 2À units. The lifetime value of (CH 6 N 3 ) 2 MnBr 4 has not been proven, but compared with the similar A 2 BX 4 type Mn 2+ -based chlorides, 42,43 its lifetime value is smaller, which is in line with the law of the influence of halogen ions on the lifetime in green-emitting Mn 2+ -based halides. 15 Accordingly, the red emission peaked at 627 nm is attributed to the d-d transition ( 4 T 1 (G) -6 A 1 (S)) of six coordinated [Mn 3 Br 12 ] 6À units.…”

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confidence: 60%

“…40,41 In addition, the 0D Mn 2+based OIMHs with a highly efficient red emission have also been reported and popularized recently. However, only a small amount of 0D Mn 2+ -based OIMHs that can emit red light was investigated so far, 3,24,42,43 and there is no comparative analysis of their luminescence mechanism by binding to that of 0D Mn 2+ -based OIMHs with green light emission.…”

Section: Introductionmentioning

confidence: 99%

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Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

et al. 2022

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confidence: 60%

Section: Introductionmentioning

confidence: 99%

Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

et al. 2022

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“…Owing to this feature, as well as longer wavelength position of the phosphorescence band (730 nm, close to NIR domain), luminescence chromaticity of 6 can be tuned in a wider visible range: from a deep blue to a red (Figure b). It should also be remarked that phosphorescence lifetime of 6 being 21.5 µs is unusually short for the emitting 4 T 1 (G)→ 6 A 1 transition in Mn 2+ ion,, whereas the fluorescence lifetime is normal ( τ 1 = 1.2 ns, τ 2 = 11.5 ns).…”

Section: Resultsmentioning

confidence: 97%

“…The red band of 5 has a mono‐exponential decay with the lifetime being peculiar for Mn 2+ ‐based phosphorescence, i.e. τ = 1.11 ms …”

Section: Resultsmentioning

confidence: 99%

“…The classical cases are represented by octahedral ( O h ) and tetrahedral ( T d ) ligand fields, in which Mn 2+ ion emits in red (610–660 nm) and green (510–560 nm) regions, respectively . For example, the commonly known halomanganates [MnHal 4 ] 2– display green luminescence, while the complexes of [(L)MnHal 3 ] and L 6 [Mn 3 Cl 12 ] type (L = protonated or alkylated N ‐base) and Mn 2+ ‐doped sulfide and oxide nanocrystals, , exhibit red emission. The compounds containing both tetrahedral and octahedral Mn II centers, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Manganese(II) Thiocyanate Complexes with Bis(phosphine Oxide) Ligands: Synthesis and Excitation Wavelength‐Dependent Multicolor Luminescence

et al. 2020

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First examples of luminescent MnII thiocyanate complexes are presented. A series of such compounds has been synthesized via the reaction of Mn(NCS)2 with bis(phosphine oxides), Ph2P(O)–X–(O)PPh2, where X = CH2 (L1), CH2CH2 (L2), CH2CH2CH2 (L3), CH2C(=CH2)CH2 (L4), C(=CH2)C(=CH2) (L5) and C≡C (L6). The L1, L3 and L4 ligands, when reacted with Mn(NCS)2 on air (EtOH/acetone, r.t.), produce chelate complexes [MnII(O^O)2(NCS)2]. Under similar conditions, L5 gives ionic complex [MnII(L5)3][MnII(NCS)4], whereas L6 affords chain coordination polymer (CP) [MnII(L6)2(NCS)2]n. By contrast, ligand L2 results in formation of mixed‐valent chain CP [MnIIMnIII(L2)3(NCS)5]n. Complex [Mn(L4)2(NCS)2] and CP [Mn(L6)2(NCS)2]n display unique dual luminescence, i.e. the intraligand fluorescence (blue band) and MnII‐centered phosphorescence (red band), the ratio of which is largely modulated by excitation wavelength. Through this feature, the luminescence color of these complexes can be smoothly tuned from deep‐blue to red. Complex [Mn(L5)3][Mn(NCS)4] shows MnII‐based phosphorescence only.

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Guanidine‐Templated Manganese Halides Single Crystals toward Efficient Mechanoluminescence and Photoluminescence by Supramolecular Interactions Modulation

Liu

Yang

et al. 2021

Advanced Optical Materials

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other type of light emitting materials, ML functional materials are sensitive to mechanical stimuli and have strong optical response, which have attracted considerable interest in recent years due to their potential application in data recording, [2] anti-counterfeiting device, [3] artificial skins, [4] security surveillance, and stress-sensing. [5] Up to date, organometallic ML materials have attracted wide attention in recent years owing to their structural diversity, facile synthesis, lowtoxicity, and low-cost. [6] In spite of the ML phenomena being studied for hundreds of years and tons of ML functional materials being found, [7] the precise relationship between the structure of ML materials and ML effect is still unclear and call for much more exploration, especially about the exact mechanism with quantitative investigation. [6] As an important subclass of ML materials, hybrid manganese-halides, generally templated by manganese with a variety of organic geometries, have drawn wide attention in recent years owing to their structural diversity, high emission efficiency, tunable emission, and other appealing photophysical properties. [8] Recently, Huang's group have reported a series of 0D phosphonium-manganese-based halides complexes with tetrahedrally coordinated environment, [9] which have thrown some light on the origins of ML process of organic-inorganic hybrid metal-halide materials. [10] Organic-inorganic hybrid metal halides materials possess attractive virtues of designable optical-electric properties, high charge carrier transport properties, and special defect tolerance ability, making it an excellent candidate in many important optical-electric areas. For instance, organic-inorganic hybrid metal-halide perovskites with a variety of intriguing photophysical properties for the diverse organic components have received increasing interests including solar cells, [11] light-emitting diodes, [12] laser, [13] and detectors. [14] However, the choice of suitable organic molecules for excellent optoelectronic materials is a very tricky issue. [15] Accordingly, there is an urgent requirement to explore diversity cations for functional materials. Interaction between organic molecule and inorganic frameworks can significantly change the photophysical properties of organic metal-halides hybrid materials.Here, a family of guanidine-based manganese-halides is synthesized via supramolecular interactions modulation by adjusting conjugated degree and the number of hydrogen-bonding donors in the guanidine-based templates cations, which further endows intriguing optoelectrical properties. Single-crystalline mono-gua (gua = (C(NH 2 ) 3 +)) and bigua-functional group (bigua = (C(NH 2 ) 2 NHC(NH 2 ) 2 ) 2+ )-based manganese-halides are prepared and efficient phosphorescence as well as strong mechanoluminescence (ML) are achieved by modulating the hydrogen-bonding interaction and CH⋯π interaction with the manganese-halides. The stronger weak interaction between the metal-halides and organic ligands greatly reduces the...

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Unprecedented 30 K hysteresis across switchable dielectric and magnetic properties in a bright luminescent organic–inorganic halide (CH₆N₃)₂MnCl₄

Abstract: Highly luminescent hybrid (CH6N3)2MnCl4 featuring unique (Mn3Cl12)6− units in the crystal structure, exhibits a remarkable 30 K hysteresis across dielectric and magnetic switching.

Cited by 41 publications

References 42 publications

Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Manganese(II) Thiocyanate Complexes with Bis(phosphine Oxide) Ligands: Synthesis and Excitation Wavelength‐Dependent Multicolor Luminescence

Guanidine‐Templated Manganese Halides Single Crystals toward Efficient Mechanoluminescence and Photoluminescence by Supramolecular Interactions Modulation

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Unprecedented 30 K hysteresis across switchable dielectric and magnetic properties in a bright luminescent organic–inorganic halide (CH6N3)2MnCl4

Abstract: Highly luminescent hybrid (CH6N3)2MnCl4 featuring unique (Mn3Cl12)6− units in the crystal structure, exhibits a remarkable 30 K hysteresis across dielectric and magnetic switching.

Cited by 41 publications

References 42 publications

Coordination units of Mn2+ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Coordination units of Mn2+ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Manganese(II) Thiocyanate Complexes with Bis(phosphine Oxide) Ligands: Synthesis and Excitation Wavelength‐Dependent Multicolor Luminescence

Guanidine‐Templated Manganese Halides Single Crystals toward Efficient Mechanoluminescence and Photoluminescence by Supramolecular Interactions Modulation

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Unprecedented 30 K hysteresis across switchable dielectric and magnetic properties in a bright luminescent organic–inorganic halide (CH₆N₃)₂MnCl₄

Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes