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Benzo[c]thiophene Chromophores Linked to Cationic Fe and Ru Derivatives for NLO...
Silva, Tiago J. L.; Mendes, Paulo J.; Garcia, M. Helena; Robalo, M. Paula; Prates Ramalho, J. P.; Palace Carvalho, A. J.; Büchert, Marinaη5-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 Introduc...
Pilot-scale study on the removal of pharmaceuticals by LECA based SSF-construct...
Dordio, Ana V.; Pinto, Ana P.; Palace Carvalho, A. J.; Costa, CristinaIn recent years, the occurrence and fate of pharmaceutically active compounds (PhACs) in the aquatic environment has been recognized as one of the emerging issues in environmental chemistry. Some compounds are just resistant to degradation in the sewage treatment plants (STPs) while others, although suffering partial degradation, still end up in receiving water bodies due to the large inputs received in STPs [1...
Sorption behavior of granular matrices for application in pharmaceutical remova...
Dordio, Ana V.; Estêvão Candeias, A. J.; Pinto, Ana P.; Costa, Cristina; Palace Carvalho, A. J.In recent years, the occurrence and fate of pharmaceutically active compounds (PhACs) in the aquatic environment has been recognized as one of the emerging issues in environmental chemistry. Clofibric acid, ibuprofen and carbamazepine are some of the most frequently found PhACs in environmental monitoring studies. Some xenobiotics have already been successfully removed from contaminated waters using constructed...
Removal of pharmaceuticals in constructed wetlands using Typha and LECA. A pilo...
Dordio, Ana V.; Palace Carvalho, A. J.; Estêvão Candeias, A. J.; Pinto, Ana P.; Costa, CristinaAn ever-increasing number of xenobiotic compounds are getting detected in environmental samples worldwide. Serious concern about the contamination of water resources and drinking water supplies has aroused from the prevalence of pharmaceutical residues in the aquatic ecosystems. Some pharmaceuticals such as ibuprofen, carbamazepine and clofibric acid are frequently detected in waters [1]. These compounds are ge...
Using clay materials to remove pharmaceuticals from waters
Dordio, Ana V.; Palace Carvalho, A. J.; Estêvão Candeias, A. J.; Pinto, Ana P.; Costa, CristinaPharmaceutical active compounds (PhACs) have an important role in the treatment and prevention of disease in both human and animals. Ingested drugs are only partially absorbed by the organisms and studies have shown that the excreted compounds are only partially removed in the sewage treatment plants (STPs) [1]. Contaminated effluents are being released from the STPs and trace amounts of PhACs have been detecte...
Removing pharmaceutical residues from contaminated wastewaters using expanded c...
Dordio, Ana V.; Pinto, Ana P.; Estêvão Candeias, A. J.; Palace Carvalho, A. J.; Costa, CristinaPharmaceutical compounds (PhCs) are ingested in large quantities by humans in treatment and prevention of disease, but they are only partially absorbed by the organisms being excreted together with their metabolites. The sewage treatment plants (STP) are only able to partially remove some of these compounds and, despite the low concentrations present in the wastewaters (ng-μg/L), these xenobiotics can still pos...
Influence of mordants in the colour of natural dyes: theoretical predictions an...
Costa, Cristina; Estêvão Candeias, A. J.; Palace Carvalho, A. J.; Prates Ramalho, J. P.Arraiolos tapestries are probably one of the richest artistic Portuguese expressions in terms of textile production and a cultural heritage that urges to preserve. The richness of colours displayed by some of the Arraiolos tapestries denotes the likely use of a wide variety of dyes. The different light-fastness of dyes combined with the use of different types of mordants can also explain the appearance of pale ...
First hyperpolarizabilities of half-sandwich iron (II) complexes with thiophene...
Palace Carvalho, A. J.; Mendes, Paulo J.Organometallic complexes have been studied as potential building blocks for second-order nonlinear optical (SONLO) materials in view of their potential application in the area of integrated optics.1 Experimental work on 5-monocyclopentadienyliron(II) complexes with acetylide and nitrile benzene-based chromophores showed that acetylides have higher first hyperpolarizabilities (β) than the corresponding nitriles...
T-20 and T-1249 HIV fusion inhibitors’ structure and conformational behavior in...
Canto, A. M. T. M.; Palace Carvalho, A. J.; Prates Ramalho, J. P.Fusion of the HIV envelope with the target cell membrane is a critical step of HIV entry into the target cell. Several peptides based on the C-region of HIV gp41 have been used in clinical trials as possible HIV fusion inhibitors. Among these are T-1249 and T-20 (also known as enfurvitide; see fig. 1). Despite recent works, a detailed molecular picture of the inhibitory mechanism of these molecules is still lac...
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