Dalice Piñero Cruz

Dalice Piñero Cruz
University of Puerto Rico at Rio Piedras | UPR-RP · Department of Chemistry

PhD

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36
Publications
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205
Citations

Publications

Publications (36)
Article
We characterized the prominent electron transport layer 2,2′,2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi) via single crystal X-ray diffraction, grazing incidence X-ray diffraction (GIXRD), infrared reflection absorption spectroscopy (IRRAS) and quantum mechanical calculations. The crystals generated via vapor diffusion are of the...
Article
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The reaction between [TBA] 2 [Zn(dmit) 2 ] and 3-chloro-2,4-pentanedione yielded single crystals of the title compound, (3 E ,3′ E )-3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(4-hydroxypent-3-en-2-one), C 13 H 14 O 4 S 5 , after solvent evaporation. The title compound crystallizes in the triclinic space group P \overline{1} w...
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The title ferrocene derivative, [Fe(C 5 H 5 ) 2 (C 8 NO 2 )], including an alkyne bonded to a para -nitrophenyl substituent, which was synthesized from a copper-free Sonogashira cross-coupling reaction between ethynylferrocene and 4-bromo-1-nitrobenzene, crystallizes in the P 2 1 / n space group. In the ferrocene unit, the pentadienyl (Cps) rings a...
Article
A pillared layer network containing amide functional groups [Cu(pzdc)(pia); pzdc: pyrazine-2,3-dicarboxylate; pia: N-(4-pyridyl)-isonicotinamide] was used to test a post-synthesis metalation rationale to insert lithium and create a porous surface with enhanced for CO2 adsorption capacity. Synchrotron powder X-ray diffraction (XRD) was used to deter...
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The title compound, diaqua[tris(2-aminoethyl)amine]nickel(II) hexaaquanickel(II) bis(sulfate), [Ni(C 6 H 18 N 4 )(H 2 O) 2 ][Ni(H 2 O) 6 ](SO 4 ) 2 or [Ni(tren)(H 2 O) 2 ][Ni(H 2 O) 6 ](SO 4 ) 2 , consists of two octahedral nickel complexes within the same unit cell. These metal complexes are formed from the reaction of [Ni(H 2 O) 6 ](SO 4 ) and th...
Article
In recent times, nanotechnology has drawn the attention of the scientific community because of the wide variety of applications that can be done with it, from food packaging to targeted drug delivery; the use of nanoparticles has been a breakthrough in science that has now reached the market. Silver nanoparticles (Ag NPs) have unique properties due...
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The title compound, C 7 H 3 F 5 INS, a pentafluorosulfanyl (SF 5 ) containing arene, was synthesized from 4-(pentafluorosulfanyl)benzonitrile and lithium tetramethylpiperidide following a variation to the standard approach, which features simple and mild conditions that allow direct access to tri-substituted SF 5 intermediates that have not been de...
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Species of the genus Simarouba have been studied because of their antimalarial and antileukemic activities. A group of oxygenated terpenes called quassinoids have been isolated from species of the Simarouba genus, and are responsible for its therapeutic properties. We hypothesized that Simarouba tulae, an endemic plant from Puerto Rico, is a natura...
Article
We present the synthesis of the tridentate Schiff base 2-(1-((pyridine-2-ylmethyl)imino)ethyl)naphtalen-1-ol (LH) providing a NNO coordination environment. Two new Ni(II) and Cu(II) complexes with a ligand to metal stoichiometric ratio of 1:1 and 2:1, respectively, were synthesized from LH. The Cu(II) complex of general formula [Cu(L)(MeOH)](ClO4)·...
Article
Three mononuclear metal complexes of Co²⁺, Ni²⁺ and Cu²⁺ with the Salen type ligand ((2,2 '- [(1-methyl-1,2-ethanediyl) bis(nitriloethylidyne)] bis(1-naphthalenol)), H2Naphpren or L) were synthesized and structurally characterized. All metal complexes have square planar geometries and crystallize in the P21/c space group. Structural characterizatio...
Article
The title compound, C 11 H 18 O 4 , consists of an anti , anti , anti -stereotetrad with a 1,2-carbonate and an alkene motif. The molecule displays a common zigzag conformation. The five-membered ring has a twisted conformation on the C—C bond. In the crystal, a strong intermolecular hydrogen bond between the hydroxy group and the carboxylate moiet...
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The title compound, C11H18O4, consists of an anti,anti,anti-stereo­tetrad with a 1,2-carbonate and an alkene motif. The mol­ecule displays a common zigzag conformation. The five-membered ring has a twisted conformation on the C—C bond. In the crystal, a strong inter­molecular hydrogen bond between the hy­droxy group and the carboxyl­ate moiety from...
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The title compound, C20H42O3S2Si, crystallized with two independent mol-ecules (A and B) in the asymmetric unit. They consist of syn,anti,anti-stereo-tetrads with a 1,3-di-thiane motif and a primary alcohol protected as the triisopropyl silyl ether. The 1,3-di-thiane ring adopts a chair conformation, while the rest of each mol-ecule displays a comm...
Article
The design of molecule-based systems displaying tuneable optical and/or magnetic properties under external stimuli has received a great deal of attention in the past few years. This interest is driven by the potential applications in high-performance molecule-based electronics in the areas of recording media, switches, sensors, and displays. As an...
Article
The reactions of FeX3 (X = Cl and Br) and pz∗H (pz∗H = pyrazole, or substituted pyrazole) in CH2Cl2 have led to three types of mononuclear complexes: mer-[FeX3(pz∗H)3], trans-[FeX2(pz∗H)4]− and trans-[FeX2(pz∗H)4]. The latter type, containing FeII-centers results from spontaneous reduction of the FeIII starting material. The X-ray crystal structure...
Article
The triangular complex [FeIII3(μ3-O)(μ-4-O2N-C3H2N2)6Br3]2– has been characterized and studied by magnetic susceptibility measurements, 57Fe Mössbauer and electron paramagnetic resonance (EPR) spectroscopic methods. A combination of experimental and computational results has allowed the differentiation between two sets of acceptable isotropic excha...
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A nickel dithiolene complex substituted with crown ether cyclic moieties incorporating four O atoms, abbreviated as [Ni(S2O4)2]1−,0, is isolated in its radical anionic (as Na+ salt) and neutral forms. The Na+ cation is six-coordinated with short NaO distances (2.46–2.52 Å), involving two crown ether moieties of two different complexes. The oxidized...
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The secondary coordination ability of a paramagnetic nickel dithiolene complex, bearing an ether coordinating function within a nine-membered flexible ring, has been demonstrated in its [NiCl(DMF)(2)](+) complex, through coordination by both ether and thioether functions, allowing for a ferromagnetic interaction between both paramagnetic entities.
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Six [Fe(8)(μ(4)-O)(4)(μ-4-R-pyrazolato)(12)X(4)] complexes containing an identical Fe(8)(μ(4)-O)(4) core have been structurally characterized and studied by Mössbauer spectroscopy. In each case, an inner μ(4)-O bridged Fe(III) cubane core is surrounded by four trigonal bipyramidal iron centers, the two distinct sites occurring in a 1:1 ratio. The M...
Article
The mechanisms of the thermal and photochemical redox reactions of clusters [Fe(III)(8)(mu(4)-O(4))(mu-Pz)(12)X(4)] (Pz = pyrazolate anion, X = Cl or Br) were investigated in this work. Reactions of the complexes with e(-)(sol), C(*)H(2)OH, and several powerful reducing transition metal complexes were investigated using the pulse radiolysis techniq...
Article
A comparison is made between the structural, spectroscopic, electrochemical, and magnetic properties of pyrazolate versus carboxylate complexes [Fe3(mu3(mu3O)(mu-LL)6Cl3]2- containing the Fe3(mu3-O)-motif. While the Fe3(mu3-O)-cores are structurally indistinguishable in the two types of complexes, their magnetic properties deviate from the expected...
Article
Full-text available
A comparison is made between the structural, spectroscopic, electrochemical, and magnetic properties of pyrazolate versus carboxylate complexes [Fe3(μ3(μ3O)(μ-LL)6Cl3]2− containing the Fe3(μ3-O)-motif. While the Fe3(μ3-O)-cores are structurally indistinguishable in the two types of complexes, their magnetic properties deviate from the expected valu...

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