HS⇆LS Transition in Iron(II) Two-Dimensional Coordination Networks Containing Tris(tetrazol-1-ylmethyl)methane As Triconnected Building Block

Białońska, Agata; Bronisz, Robert; Rudolf, Mikołaj F.; Weselski, Marek

doi:10.1021/ic201535x

Cited by 17 publications

(18 citation statements)

References 57 publications

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“…Recently, a honeycomb-like pattern with cages occupied by disordered anions was discovered for [Fe{C(mtz) 3 } 2 ]A 2 , (A = ClO 4 − , BF 4 − ) built from another spider-like ligand, C(mtz) 3 = tris(tetrazol-1-ylmethyl)methane. These 2D materials both display a sharp ST at T 1/2 = 193 K (BF 4 − ) and T 1/2 = 176 K (ClO 4 − ) [337]. [Fe(trptrz) 2 ](BF 4 ) 2 ·5H 2 O with trptrz = tris-3-[1,2,4]triazol-4-ylpropyl phloroglucinol, obtained thanks to a Mitsonubu coupling, is another example of 2D SCO CP based on a tripodal ligand.…”

Section: Reviewmentioning

confidence: 99%

Spin state switching in iron coordination compounds

Gütlich¹,

Gaspar²,

Garcia³

2013

Beilstein J. Org. Chem.

666

608

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SummaryThe article deals with coordination compounds of iron(II) that may exhibit thermally induced spin transition, known as spin crossover, depending on the nature of the coordinating ligand sphere. Spin transition in such compounds also occurs under pressure and irradiation with light. The spin states involved have different magnetic and optical properties suitable for their detection and characterization. Spin crossover compounds, though known for more than eight decades, have become most attractive in recent years and are extensively studied by chemists and physicists. The switching properties make such materials potential candidates for practical applications in thermal and pressure sensors as well as optical devices.The article begins with a brief description of the principle of molecular spin state switching using simple concepts of ligand field theory. Conditions to be fulfilled in order to observe spin crossover will be explained and general remarks regarding the chemical nature that is important for the occurrence of spin crossover will be made. A subsequent section describes the molecular consequences of spin crossover and the variety of physical techniques usually applied for their characterization. The effects of light irradiation (LIESST) and application of pressure are subjects of two separate sections. The major part of this account concentrates on selected spin crossover compounds of iron(II), with particular emphasis on the chemical and physical influences on the spin crossover behavior. The vast variety of compounds exhibiting this fascinating switching phenomenon encompasses mono-, oligo- and polynuclear iron(II) complexes and cages, polymeric 1D, 2D and 3D systems, nanomaterials, and polyfunctional materials that combine spin crossover with another physical or chemical property.

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Section: Reviewmentioning

confidence: 99%

Spin state switching in iron coordination compounds

Gütlich¹,

Gaspar²,

Garcia³

2013

Beilstein J. Org. Chem.

666

608

View full text Add to dashboard Cite

show abstract

“…These ). [56] [Fe(trptrz) 2 ](BF 4 ) 2 •5H 2 O with trptrz = tris-3-[1,2,4]triazol-4-yl-propyl phloroglucinol, which was obtained via a multistep synthesis involving a Mitsunobu coupling, is another example of 2D SCO CP based on a tripodal ligand. It reveals however a gradual spin conversion due to the flexible propyl group attached to the 1,2,4-triazole ligand that cushions elastic interactions between Fe II centers.…”

Section: D and 3d Networkmentioning

confidence: 99%

“…Crystal structure of [Fe{C(mtz) 3 } 2 ](BF 4 ) 2 ; a) 2D corrugated sheet like CP with a honeycomblike topology; b) TOPOS [50] diagram of the 2D honeycomb network; c) occlusion of BF 4 -within the voids of 2D corrugated sheet (space-fill model with purple colour). [56] Fig. 10.…”

Section: D and 3d Networkmentioning

confidence: 99%

Crystal Engineering of FeII Spin Crossover Coordination Polymers Derived from Triazole or Tetrazole Ligands

Garcia¹,

Adarsh

Naik

2013

Chimia

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The past decade has witnessed intense research activity in the area of Fe(II) spin crossover coordination polymers, which are structurally diverse and functionally intriguing materials. In this endeavor, a less exploited series of ligands have been selected among various N-donor triazole and tetrazole molecules. Developing conventions that allow the tailoring of such functional materials with predictable architecture and properties is an important objective and current interest in crystal engineering. However, detailed knowledge on the structure-property correlation is still scanty due to the small number of crystal structures of such compounds. The principal focus is to decipher the effect of various supramolecular factors such as intermolecular interactions, hydrogen bonding etc., on the resultant Fe(II) coordination polymers. This tutorial review aims at highlighting some of the developments of such structurally diverse and functionally intriguing 1D polymeric chains, 2D and 3D networks built from triazole or tetrazole ligands exhibiting fascinating spin crossover phenomena.

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“…Nearly all synthetic approaches to substituted tetrazoles include a [2+3] cycloaddition of an azide source and primary amines and isonitriles, yielding N1‐isomers, or nitriles, leading to the C5‐isomers . Commonly, N2‐isomers are obtained after alkylation of 1 H ‐tetrazole and subsequent chromatographic separation …”

Section: Introductionmentioning

confidence: 99%

Aryl and Heteroaryl N1‐Tetrazoles through Ligand‐Free Suzuki‐Reaction under Aerobic, Aqueous Conditions

et al. 2017

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Substituted 1‐biaryl‐1H‐tetrazoles are classically obtained from the corresponding 1‐aminobiaryls, limiting the selection of substrates. The development and substrate scope of a green, ligand‐free Suzuki protocol in aqueous media under ambient atmosphere, leading to 1‐biaryl‐ and heteroaryl‐substituted 1H‐tetrazoles in very good to excellent yields is presented. The combination of PdCl2/NEt3/H2O/EtOH was found to combine high yields and high purity for all substrates investigated. Comparative experiments investigating the reaction rate showed that the tetrazole does not act as a ligand for the palladium catalyst.

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HS⇆LS Transition in Iron(II) Two-Dimensional Coordination Networks Containing Tris(tetrazol-1-ylmethyl)methane As Triconnected Building Block

Cited by 17 publications

References 57 publications

Spin state switching in iron coordination compounds

Spin state switching in iron coordination compounds

Crystal Engineering of FeII Spin Crossover Coordination Polymers Derived from Triazole or Tetrazole Ligands

Aryl and Heteroaryl N1‐Tetrazoles through Ligand‐Free Suzuki‐Reaction under Aerobic, Aqueous Conditions

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