Novel Polythreaded Coordination Polymer: from an Armed-Polyrotaxane Sheet to a 3D Polypseudorotaxane Array, Photo- and Thermochromic Behaviors

Yao, Qingxia; Ju, Zhan‐Feng; Jin, Xu-Hui; Zhang, Jie

doi:10.1021/ic8021672

Cited by 130 publications

(77 citation statements)

References 32 publications

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“…In addition, the difference in the stability of two compounds should be related to the different configurations in 1 and 2 . With the protection of the MOF host network, the embedded guest EV• + radical of 2 has a longer lifetime in air due to the dense packing mode, which prevents the generated radicals from contacting with free oxygen . This also explains why compound 2 is more stable.…”

Section: Resultsmentioning

confidence: 99%

Novel Photo‐ and Thermo‐Responsive Host‐Guest Compounds Derived from Ethyl Viologen Cations

Liu

2018

ChemistrySelect

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The self‐assembly reaction of TM(NO3)2 (TM=Co, Ni), benzenedicarboxylic acid (H2BDC), and ethyl viologen cations leads to two novel host‐guest compounds (EV)[Co(H2O)6](p‐BDC)2⋅4H2O (1) and {(EV)[Ni3(m‐BDC)4]}n (2), (p‐H2BDC=1,4‐benzenedicarboxylic acid, m‐H2BDC=1,3‐benzenedicarboxylic acid, EV2+=1,1’‐bis(ethyl)‐4,4’‐bipyridinium dication). Compound 1 is a host‐guest supramolecule consisting of one EV2+ cation, one [Co(H2O)6]2+ cation, two uncoordinated deprotonated p‐BDC2− anions and four free H2O molecules, which exhibits electron‐transfer (ET) photochromism and thermochromism through dehydration and rehydration. Furthermore, 1 can exhibit a secondary ET photochromism after thermal stimuli. Compound 2 is constructed by the combination of ethyl viologen guest molecule and a highly stable [Ni3(m‐BDC)4]n host MOF, displaying both photo‐ and thermo‐induced electron transfer reaction. The different packing modes of the donor and acceptor blocks between 1 and 2 lead to the different chromic properties.

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Section: Resultsmentioning

confidence: 99%

Novel Photo‐ and Thermo‐Responsive Host‐Guest Compounds Derived from Ethyl Viologen Cations

Liu

2018

ChemistrySelect

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“…These very distinct changes (see Figure 11b) were attributed to the magnetic interactions between the radical species formed upon dehydration and the metal ions of the MOFs. In a similar fashion, two more research groups utilized a viologen bearing flexible benzyl-based N-substituents with only one carboxylate unit each to obtain a Zn7-cluster/MOF with interesting multi-chromic properties (electrochromic, thermochromic, photochromic, and basochromic) [48] and a Cd(II) 3D polypseudorotaxane array with photo-and thermo-chromic properties (see viologen 25 and structure 26, Figure 12) [49].…”

Section: Direct Medium-and Environment-responsive Viologensmentioning

confidence: 99%

“…The zwitterionic viologen utilized by Yao et al(25) and the structure of the repeated Cd (II) complex (26) involving viologen 25. Reproduced with permission from[49]. Copyright American Chemical Society.…”

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confidence: 99%

Mono- and Di-Quaternized 4,4′-Bipyridine Derivatives as Key Building Blocks for Medium- and Environment-Responsive Compounds and Materials

Papadakis

2019

Molecules

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Mono-and di-quaternized 4,4 -bipyridine derivatives constitute a family of heterocyclic compounds, which in recent years have been employed in numerous applications. These applications correspond to various disciplines of research and technology. In their majority, two key features of these 4,4 -bipyridine-based derivatives are exploited: their redox activity and their electrochromic aptitude. Contemporary materials and compounds encompassing these skeletons as building blocks are often characterized as multifunctional, as their presence often gives rise to interesting phenomena, e.g., various types of chromism. This research trend is acknowledged, and, in this review article, recent examples of multifunctional chromic materials/compounds of this class are presented. Emphasis is placed on solvent-/medium-and environment-responsive 4,4 -bipyridine derivatives. Two important classes of 4,4 -bipyridine-based products with solvatochromic and/or environment-responsive character are reviewed: viologens (i.e., N,N -disubstituted derivatives) and monoquats (i.e., monosubstituted 4,4 -bipyridine derivatives). The multifunctional nature of these derivatives is analyzed and structure-property relations are discussed in connection to the role of these derivatives in various novel applications.Molecules 2020, 25, 1 2 of 30 recent) underlining the high versatility of this class of compounds [9,10,[12][13][14][15]. Perhaps, the most reviewed subject regarding the viologens is their electrochromism [13,14,16]. Viologens are known to undergo one-electron reductions electrochemically ( Figure 2) yielding colorful radicals i.e., cations that are stable in the absence of O 2 . Yet, their chromism can also be triggered through various stimuli (including light, heat, solvents, presence of various chemical species, pressure, etc.). All these possibilities shape the very versatile "chromic character" of viologens and generally of 4,4 -bipyridine derivatives. Even though this "chromic character" has only recently started gaining more attention and there is an increasing number of research articles emphasizing on the alternative uses of 4,4 -bipyridine derivatives, there are no reviews in this growing area up until now. Such an attempt is presented in this review paper with an emphasis on medium-and environment-responsive compounds and materials based on 4,4 -bipyridine. Primary focus is placed on viologen-involving solvatochromic systems as well as materials and compounds of this class whose chromic behavior is dependent on various environment stimuli. Molecules 2018, 23, x 2 of 30 Figure 2. Schemes depicting (a) the electrochromic cycle (1) and (b) the photochromic cycle of paraquat (A, counter anion). Structure and Properties of Viologens The Strong Electron-Withdrawing Character of ViologensThe strong electron-withdrawing character of viologens has been widely exploited in numerous molecular architectures and materials. Viologens can undergo reversible one-electron reductions forming radical cations (Figure 2a), which are vividly colo...

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“…[13] Recently, az witterionic type of organic ligand has drawn our attention, which simultaneously bear positive and negative chargesw ith ac ertain separated distance (usually larger than 4), as well as differenta romatic groups connected through unconjugated linkers. [14][15][16] The ligand itselfa satotal is neutral, and generally has the following attributes in assembling coordination compounds:1 )agood solubility,2 )astrongc oordination ability,3 )aseparated charged istribution on the coordination skeleton endowings pecial physical properties,f or example, improved adsorption selectivityo fg ases or vapors, and 4) an intraligandc harge-transfer (ILCT) process. The last one is unique with regard to richp hotophysical and photochemical properties, and therefore, it is helpfult om odulate the fluorescent functions of the assembled Ln complexes.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Visible‐to‐NIR Luminescence of Lanthanide(III) Complexes with Zwitterionic Ligands Bearing Charge‐Transfer Character: Beyond Triplet Sensitization

Pan

Zhu

et al. 2016

Chemistry A European J

114

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Two zwitterionic-type ligands featuring π-π* and intraligand charge-transfer (ILCT) excited states, namely 1,1'-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene)dipyridinium-4-olate (TMPBPO) and 1-dodecylpyridin-4(1 H)-one (DOPO), have been prepared and applied to the assembly of lanthanide coordination complexes in an effort to understand the ligand-direction effect on the structure of the Ln complexes and the ligand sensitization effect on the luminescence of the Ln complexes. Due to the wide-band triplet states plus additional ILCT excitation states extending into lower energy levels, broadly and strongly sensitized photoluminescence of f→f transitions from various Ln(3+) ions were observed to cover the visible to near-infrared (NIR) regions. Among which, the Pr, Sm, Dy, and Tm complexes simultaneously display both strong visible and NIR emissions. Based on the isostructural feature of the Ln complexes, color tuning and single-component white light was achieved by preparation of solid solutions of the ternary systems Gd-Eu-Tb (for TMPBPO) and La-Eu-Tb and La-Dy-Sm (for DOPO). Moreover, the visible and NIR luminescence lifetimes of the Ln complexes with the TMPBPO ligand were investigated from 77 to 298 K, revealing a strong temperature dependence of the Tm(3+) ((3) H4 ) and Yb(3+) ((2) F5/2 ) decay dynamics, which has not been explored before for their coordination complexes.

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Novel Polythreaded Coordination Polymer: from an Armed-Polyrotaxane Sheet to a 3D Polypseudorotaxane Array, Photo- and Thermochromic Behaviors

Cited by 130 publications

References 32 publications

Novel Photo‐ and Thermo‐Responsive Host‐Guest Compounds Derived from Ethyl Viologen Cations

Novel Photo‐ and Thermo‐Responsive Host‐Guest Compounds Derived from Ethyl Viologen Cations

Mono- and Di-Quaternized 4,4′-Bipyridine Derivatives as Key Building Blocks for Medium- and Environment-Responsive Compounds and Materials

Highly Efficient Visible‐to‐NIR Luminescence of Lanthanide(III) Complexes with Zwitterionic Ligands Bearing Charge‐Transfer Character: Beyond Triplet Sensitization

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