| Texto completo | |
| Autor(es): |
Eusterwiemann, Steffen
[1]
;
Doerenkamp, Carsten
[2, 3]
;
Dresselhaus, Thomas
[1, 4]
;
Janka, Oliver
[5]
;
Daniliuc, Constantin G.
[1]
;
Poettgen, Rainer
[5]
;
Studer, Armido
[1]
;
Eckert, Hellmut
[2, 3]
;
Neugebauer, Johannes
[1, 4]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [1] Westfalische Wilhelms Univ Munster, Organ Chem Inst, Corrensstr 40, D-48149 Munster - Germany
[2] Westfalische Wilhelms Univ Munster, Inst Phys Chem, Corrensstr 28-30, D-48149 Munster - Germany
[3] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP - Brazil
[4] Westfalische Wilhelms Univ Munster, Ctr Multiscale Theory & Computat, Corrensstr 40, D-48149 Munster - Germany
[5] Westfalische Wilhelms Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 28-30, D-48149 Munster - Germany
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Chemistry Chemical Physics; v. 20, n. 35, p. 22902-22908, SEP 21 2018. |
| Citações Web of Science: | 0 |
| Resumo | |
In this study, we address the question of the origin of ferromagnetic or antiferromagnetic interactions in alkynyl-substituted 1,5-diphenyl-6-oxo verdazyl radicals. While a TMS-alkynyl derivative (3) shows antiferromagnetic ordering at low temperatures, the corresponding deprotected alkynyl verdazyl (4) shows ferromagnetic interactions. For both compounds, magnetic Heisenberg chains are characteristic, which were studied systematically by means of X-ray crystallography and quantum chemical calculations. Ferromagnetic interactions are rarely found in such radicals. Therefore, uncovering such structure-property relationships is of crucial importance in order to understand and design promising ferromagnetic networks. Using this knowledge, we were able to design and crystallize diyne derivatives showing comparable solid state characteristics and therefore antiferro- and ferromagnetic Heisenberg chain structures. We show that the understanding of such property-structure relationships is adequate for the design of organic-magnetic materials with defined cooperative effects within the class of verdazyl radicals. (AU) | |
| Processo FAPESP: | 17/06649-0 - Novos materiais óticos baseados em vidros e cerâmicas oxifluoretos dopados com terras-raras: estudos estruturais por ressonância paramagnética eletrônica. |
| Beneficiário: | Carsten Doerenkamp |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |