Zobrazeno 1 - 10
of 242
pro vyhledávání: '"Silvano Geremia"'
Autor:
Paolo Della Sala, Veronica Iuliano, Margherita De Rosa, Carmen Talotta, Rocco Del Regno, Placido Neri, Silvano Geremia, Neal Hickey, Carmine Gaeta
Publikováno v:
Molecules, Vol 29, Iss 17, p 4142 (2024)
We recently introduced calix[n]naphth[m]arenes as a novel class of deep-cavity hybrid macrocycles constituted by phenol (n) and naphthalene (m) units. In this study, we report the synthesis, conformational analysis, spectroscopic properties, and soli
Externí odkaz:
https://doaj.org/article/32cc5ad8000c4339af7034a1e168c162
Publikováno v:
Crystals, Vol 14, Iss 4, p 343 (2024)
This paper investigates pseudo-polymorphism in 2-pyridylmethoxy derivatives of p-tert-butylcalix[4]arene (PyC4), p-tert-butyldihomooxa-calix[4]arenes (PyHOC4), and p-tert-butylhexahomotrioxacalix[3]arenes (PyHO3C3), presenting 11 crystal structures w
Externí odkaz:
https://doaj.org/article/d5cff8e353314b0a938d680aa8205e97
Publikováno v:
Molecules, Vol 28, Iss 1, p 240 (2022)
Vitamin B12, also known as the anti-pernicious anemia factor, is an essential micronutrient totally dependent on dietary sources that is commonly integrated with food supplements. Four vitamin B12 forms—cyanocobalamin, hydroxocobalamin, 5′-deoxya
Externí odkaz:
https://doaj.org/article/f7bcb6214f4d44fe85999c1f51bd159c
Autor:
Alexandre S. Miranda, Defne Serbetci, Paula M. Marcos, José R. Ascenso, Mário N. Berberan-Santos, Neal Hickey, Silvano Geremia
Publikováno v:
Frontiers in Chemistry, Vol 7 (2019)
Two bidentate dihomooxacalix[4]arene receptors bearing phenylurea moieties substituted with electron-withdrawing groups at the lower rim via a butyl spacer (CF3-Phurea 5b and NO2 Phurea 5c) were obtained in the cone conformation in solution, as shown
Externí odkaz:
https://doaj.org/article/70de3ab7b1424993b1fdae4e6303f48a
Autor:
Ehsan Bahojb Noruzi, Mahsa Kheirkhahi, Behrouz Shaabani, Silvano Geremia, Neal Hickey, Fioretta Asaro, Patrizia Nitti, Hossein Samadi Kafil
Publikováno v:
Frontiers in Chemistry, Vol 7 (2019)
In this study, we synthesized a new thiosemicarbazide-functionalized calix[4]arene L and its Co2+, Ni2+, Cu2+, and Zn2+ transition metal complexes. For characterization several techniques were employed: Fourier-transform infrared (FT-IR), 1H nuclear
Externí odkaz:
https://doaj.org/article/ee4f6bdb2ebc4eeabea8d0008a9d7579
Autor:
Alexandre S. Miranda, Paula M. Marcos, José R. Ascenso, M. Paula Robalo, Vasco D. B. Bonifácio, Mário N. Berberan-Santos, Neal Hickey, Silvano Geremia
Publikováno v:
Molecules, Vol 26, Iss 6, p 1503 (2021)
Direct O-alkylation of p-tert-butyldihomooxacalix[4]arene (1) with N-(bromopropyl)- or N-(bromoethyl)phthalimides and K2CO3 in acetonitrile was conducted under conventional heating (reflux) and using microwave irradiation and ball milling methodologi
Externí odkaz:
https://doaj.org/article/a08dfaf4c250446981896f9f6e03c46e
Autor:
Alexandre S. Miranda, Paula M. Marcos, José R. Ascenso, Mário N. Berberan-Santos, Rachel Schurhammer, Neal Hickey, Silvano Geremia
Publikováno v:
Molecules, Vol 25, Iss 20, p 4708 (2020)
Fluorescent dihomooxacalix[4]arene-based receptors 5a–5c, bearing two naphthyl(thio)ureido groups at the lower rim via a butyl spacer, were synthesised and obtained in the cone conformation in solution. The X-ray crystal structures of 1,3- (5a) and
Externí odkaz:
https://doaj.org/article/6d9aefd3223c4ca5838d1535c0950ec4
Autor:
Luigi Di Costanzo, Silvano Geremia
Publikováno v:
Molecules, Vol 25, Iss 15, p 3555 (2020)
Since the discovery of fullerene, carbon-based nanomolecules sparked a wealth of research across biological, medical and material sciences. Understanding the interactions of these materials with biological samples at the atomic level is crucial for i
Externí odkaz:
https://doaj.org/article/3238e54b4fcb4cc584ba1ff1aec66909
Autor:
Ehsan Bahojb Noruzi, Behrouz Shaabani, Silvano Geremia, Neal Hickey, Patrizia Nitti, Hossein Samadi Kafil
Publikováno v:
Molecules, Vol 25, Iss 2, p 370 (2020)
The design and synthesis of a novel tert-butyl-calix[4]arene functionalized at 1, 3 positions of the lower rim with two terminal 2-hydroxybenzeledene-thiosemicarbazone moieties is reported. The new ligand with multi-dentate chelating properties was f
Externí odkaz:
https://doaj.org/article/9c8537b6c77e44b4b1f455a17439a5d9
Autor:
Paolo Della Sala, Silvano Geremia, Placido Neri, Annunziata Soriente, Mariantonietta D'Acunto, Neal Hickey, Carmine Gaeta, Carmen Talotta, Antonio Rescifina, Margherita De Rosa
Publikováno v:
Organic Letters
Monopropargyloxy-tripropoxy-calix[4]arene 1 was subjected to a propargyl Claisen rearrangement to give unusual calix[3]arene[1]chromene and homocalix[3]arene[1]benzofuran macrocycles. Quantum mechanical density functional theory calculations indicate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc2bef2d032b7a62be241adfc43a0571
https://doi.org/10.1021/acs.orglett.1c03643
https://doi.org/10.1021/acs.orglett.1c03643