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Synthesis of new Fe(II) and Ru(II) η5-monocyclopentadienyl compounds showing si...

Mendes, Paulo J.

A series of new ruthenium(II) complexes of the general formula [Ru(η5-C5H5)(PP)(L)][PF6] (PP = DPPE or 2PPh3, L = 4-butoxybenzonitrile or N-(3-cyanophenyl)formamide) and the binuclear iron(II) complex [Fe(η5-C5H5)(PP)(μ-L)(PP)(η5-C5H5)Fe][PF6]2 (L = (E)-2-(3-(4-nitrophenyl)allylidene)malononitrile, that has been also newly synthesized) have been prepared and studied to evaluate their potential in the second har...


Benzo[c]thiophene Chromophores Linked to Cationic Fe and Ru Derivatives for NLO...

Mendes, Paulo J.; Ramalho, J.P. prates; Carvalho, A. J. Palace

η5-Monocyclopentadienyliron(II)/ruthenium(II) complexes of the general formula [M(η5-C5H5)(PP)(L1)][PF6] {M = Fe, PP = dppe; M = Ru, PP = dppe or 2PPh3; L1 = 5-[3-(thiophen-2-yl)benzo[c]thiophenyl]thiophene-2-carbonitrile} have been synthesized and studied to evaluate their molecular quadratic hyperpolarizabilities. The compounds were fully characterized by NMR, FTIR and UV/Vis spectroscopy and their electroche...


Compostos Organometálicos Contendo Derivados de Tieno[3,2-b]tiofeno com Potenci...

Mendes, Paulo J.; Santos, A.M.; Garcia, M.H.; Silva, T.J.; Robalo, M.P.

A comutação das propriedades ópticas não-lineares (NLO) é de grande interesse na área da optoelectrónica e fotónica. O conceito de comutação molecular com base nas propriedades de NLO baseia-se na possibilidade de conseguir uma mudança na resposta óptica não linear entre duas formas ('on' e 'off'), desde que essas duas formas moleculares possuam uma grande diferença na magnitude das respectivas hiperpolarizabil...


Hiperpolarizabilidades Quadráticas de Acetiletos Metálicos Contendo Derivados N...

Mendes, Paulo J.; Silva, T.J.; Garcia, M. H.; Heck, J.

A óptica não-linear (NLO) lida com a modificação das propriedades de um material sob a influência de feixes de luz intensos, resultando em processos que alteram a amplitude, fase, polarização e frequência de feixes ópticos emergentes [1]. Os materiais com estas propriedades podem encontrar aplicações importantes em várias tecnologias fotónicas como dispositivos de comutação de electroóptica para telecomunicaçõe...


DFT Conformational Studies on Ruthenium (II) Complexes: Dependence of the First...

Mendes, Paulo J.

Organometallic complexes find several applications in modern chemistry, ranging from catalytic systems, bioinorganic drugs and materials chemistry. Concerning the latter, great deal of attention has been made on the optical properties of compounds containing transition metals like ruthenium and iron. The incorporation of these organometallic fragments in the development of new and highly active optical devices ...


DFT Studies on the Hyperpolarizabilities of Organometallic Complexes Containing...

Mendes, Paulo J.; Tropecêlo, P.; Carvalho, A.J.

The research of nonlinear optical (NLO) materials has grown in the past decades due to the potential application in optical device technology, like data storage, communication and bio-sensing. [1] For obtaining large molecular second-order nonlinear optical (SONLO) responses, i.e. large hyperpolarizabilities (β), molecules have to possess typical “push-pull” asymmetric structures. Organometallic complexes prese...


Scientific objects in the exhibition CHIMICA

Mendes, Paulo J.; Rosado, F.; Ferreira, T.; Conde, A.F.; Figueiredo, M.; Caldeira, A.T.; Valente, M.; Galacho, C.

Secondary School André de Gouveia (ESAG) is frequently associated to Lyceu d’Évora from which it inherited the historical and cultural background. Lyceu d’Évora was established in 1841 after the educational reform of Passos Manuel and it was set at the Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Lyceu and it was enriche...


Estimation of Hyperpolarizabilities of Organometallic Complexes by DFT

Mendes, Paulo J.; Silva, Tiago J. L.; Garcia, M. Helena; Ramalho, J. P. Prates; Carvalho, A. J. Palace

The research of nonlinear optical (NLO) materials has grown in the past decades due to the potential application in optical device technology, like data storage, communication and bio-sensing. For obtaining large molecular second-order nonlinear optical (SONLO) responses, i.e. large hyperpolarizabilities (β), molecules have to possess typical “push-pull” asymmetric structures. η5- Monocyclopentadienylruthenium...


Scientific objects in the exhibition CHIMICA

Mendes, Paulo J.; Rosado, Fernando; Ferreira, Teresa; Caldeira, Ana Teresa; Fialho, Antónia; Candeias, António; Figueiredo, Margarida; Galacho, Cristina

Secondary School André de Gouveia (ESAG) is frequently associated to Lyceu d’Évora from which it inherited the historical and cultural background. Lyceu d’Évora was established in 1841 after the educational reform of Passos Manuel and was set at Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Lyceu and it was enriched with ...


Scientific objects in the exhibition CHIMICA

Mendes, Paulo J.; Rosado, Fernando; Ferreira, Teresa; Caldeira, Ana Teresa; Candeias, António; Conde, Antónia Fialho; Figueiredo, Margarida

Secondary School André de Gouveia (ESAG) is frequently associated to Liceu de Évora from which it inherited the historical and cultural background. Lyceu Nacional d’Évora was established in 1841 after the educational reform of Passos Manuel and was set at Colégio do Espírito Santo, in Évora, until 1979. During that period, a physics and chemistry laboratory was created and developed at the Liceu and it was enri...


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Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia