Search results for "nimi"

Unprecedented blue intrinsic photoluminescence from hyperbranched and linear polyethylenimines: Polymer architectures and pH-effects

2007

The intrinsic photoluminescence properties of hyperbranched polyethylenimines (PEIs) and their linear counterpart (LPEIs) have been studied in absence of any classical fluorescent probes. The comparison of the inherent fluorescence emission between hyperbranched polyethylenimines and their linear analogues demonstrates that linear polyamines are capable of producing strong intrinsic photoluminescence species having long excited lifetimes without need of having a tridimensional-branched structure. The creation of inherently fluorescent polymeric centers from hyperbranched and linear polyethyleimines can be modulated by specific chemical modification and oxidation of amine groups as well as b…

Switchable Supramolecular Crosslinking of Cyclodextrin-Modified Hyperbranched Polyethylenimine via Anthraquinone Dyes

2011

Two anthraquinone dyes, 5,8-di-N-adamantylamino-1,4-dihydroxyanthraquinone (AQ-OH) and 1,4-di-N-adamantylaminoanthraquinone (AQ-H), are synthesized. The combination of AQ-OH and AQ-H with hyperbranched polyethylenimine (PEI) bearing covalently attached β-cyclodextrin spontaneously formed host–guest complexes with hydrodynamic diameters of about 260 nm. Even enlarged structures of the trifunctional AQ-H were observed via DLS. Repeated measurements show that their assembly and disassembly is reversible with a critical point at 26 °C and therefore switchable via temperature. Also superstructures up to 100 μm were detected via TEM, cryo-TEM-, and SEM. Hence, a smart colored network of switchabl…

ChemInform Abstract: A Theoretical Determination of the Dissociation Energy of the Nitric Oxide Dimer.

2010

Multi-reference CI methods have been applied to determine the dissociation energy and structure of thecis-N2O2 molecule. The convergence of the theoretical result has been checked with respect to a systematic expansion of the one-electron basis set and the multi-reference CI wave function. The best calculated value, 13.8 kJ/mol, is in agreement with the experimental value, 12.2 kJ/mol. It has been obtained with an extended ANO-type basis set [6s5p3d2f], including the effect of the basis set superposition error (BSSE) in the geometry optimization, and additional effects, such as the electron correlation of core electrons and relativistic corrections, using the average coupled pair functional…

Thermoresponsive hyperbranched polyethylenimines with isobutyramide functional groups

2007

N-Bromosuccinimide, Its Properties and Reactions The Course of Substitution

1964

Gesti, azione e linguaggio: il caso dei sordi isolati

2009

Lo studio esplora la natura dei sistemi gestuali sviluppati da sordi 'isolati', cioè che non hanno acquisito la lingua dei segni e le sue relazioni con il gesto co-verbale

Nazwy roślin uprawnych w śląskiej toponimii

2015

This paper deals with Silesian macrotoponyms and microtoponyms that originate from the names of crops. These toponyms are part of the linguistic picture of the Silesian world, they show agriculture, pomiculture and hortieulture methods and document the most frequently eultivated cereal plants (Jagielnica, Owiesno, Pszów), industrial plants (Chmieliska, Konopowiec, Lniszcze) and orchard plants (Gruszka, Jabłoniec, Za Trześnie). Some databases with names referto spccilic times and events (Tabaczana Ścieżka), others are connected with the folk culture, natural medicine, agrarian rites, wedding customs, etc. In the light of these names, one can see the name creator and interpreter of the world,…

Ekonomiskā krīze Baltijas valstīs

2017

Diplomdarba tēma ir “Ekonomiskā krīze Baltijas valstīs”. Ekonomomiskā krīze Baltijas valstīs var tikt analizējama no vairākiem aspektiem, gan no kvalitatīvās puses – no teorijas, gan arī kvantitatīvās – statistiskās, pamatojoties uz ekonomiskajiem rādītājiem. Baltijas valstīs ekonomiskā krīzes cēloņsakarības ir saistītas gan no globālā aspekta, sākoties finanšu krīzes procesiem Amerikas Savienotajās Valstīs, galvenokārt, banku sektora dēļ, ka arī vēlāk procesiem pārjeot arvien globālāka mērogā, tai skaitā citu pasuales banku mērogā. Visbiežāk ekonomiskās krīzes pārvarēšanas un novēršanas pasākumi tiek veikti ar finanšu isnturmentiem, politikas un piesardības pasākumiem. Problēmas būtība: Ek…

Crystal structure and Hirshfeld surface analysis of a pyridiniminium bromide salt: 1-[2-(adamantan-1-yl)-2-oxoethyl]pyridin-4-iminium bromide

2018

The asymmetric unit of the title pyridiniminium halide salt comprise of one cation and one anion. In the crystal, mol­ecules are linked by N—H⋯Br and C—H⋯O hydrogen bonds, C—H⋯π inter­actions, and π–π inter­actions into layers. The inter­molecular inter­actions in the crystal structure are qu­anti­fied by Hirshfeld surface analysis.

A second solvatomorph of poly[[μ4-N,N′-(1,3,5-oxadiazinane-3,5-diyl)bis(carbamoylmethanoato)]nickel(II)dipotassium] : crystal structure, Hirshfeld su…

2021

The title compound, poly[triaquabis[μ4-N,N′-(1,3,5-oxadiazinane-3,5-diyl)bis(carbamoylmethanoato)]dinickel(II)tetrapotassium], [K4Ni2(C7H6N4O7)2(H2O)3] n , is a second solvatomorph of poly[(μ4-N,N′-(1,3,5-oxadiazinane-3,5-diyl)bis(carbamoylmethanoato)nickel(II)dipotassium] reported previously [Plutenko et al. (2021). Acta Cryst. E77, 298–304]. The asymmetric unit of the title compound includes two structurally independent complex anions [Ni(C7H6N4O7)]2−, which exhibit an L-shaped geometry and consist of two almost flat fragments perpendicular to one another: the 1,3,5-oxadiazinane fragment and the fragment including other atoms of the anion. The central Ni atom is in a square-planar N2O2 co…