100 research outputs found
People from Brač, emigrant press in Chile and newspaper Domovina - from the late 19th century to the beginning of World War I
Cilj je rada postaviti ishodišta za proučavanje povijesti hrvatskog iseljeničkog novinstva u Čileu od najranijeg razdoblja doseljenja Hrvata do kraja 1914. godine, među kojima je brojčano dominantnu grupaciju činilo stanovništvo s Brača. Radilo se prvenstveno o ekonomskoj migraciji uzrokovanoj ekonomskim promjenama u društvu općenito, ali i ekonomskim promjenama kao posljedicama političkih kretanja. U novu domovinu donose tradicionalnu potrebu organiziranja u razna društva, ali i svijest o vlastitoj nacionalnoj pripadnosti s vlastitim jezikom. Neobično brza asimilacija (već u prvoj generaciji) dovodi u pitanje opstojnost te potrebu očuvanja baštine. Iseljeničke novine u kojima surađuju, uređuju ih i pokreću Bračani – novinari, među kojima se ističu Ivan Krstulović i Luka Bonačić s novinama „Domovina“ iz Punta Arenasa, u dosadašnjoj literaturi sagledavane su gotovo isključivo s aspekta političke orijentacije i borbe. Cilj je rada kroz primjer rubrike „Iz mjesta i okolice“, koja je održala kontinuitet tijekom cijelog razdoblja izlaženja lista „Domovina“ i čijim je sastavnim dijelom bila, prikazati, s aspekta socijalne povijesti, da su lokalne novine odražavale i bilježile pojave i događanja značajna za svakodnevni život zajednice sa svrhom očuvanja njezina identiteta.The topic of this paper is to set the starting point for studying the history of Croatian emigrant journalism in Chile from the earliest period of the settlement of Croats until the end of 1914, including the dominant population group from Brač. It was primarily the economic migration, which was caused by economic changes in the society in general, and economic changes as a consequence of political movements. The immigrants had the need for organizing themselves in various societies in the new country, and they also had the awareness of their own nationality and language. The unusually rapid assimilation (already in the first generation) calls into question the viability and the need to preserve heritage. Immigrant newspapers edited and run by Brač emigrant journalists, most notably Ivan Krstulović and Luka Bonačić, with the newspaper Domovina from Punta Arenas, were in the current literature perceived almost exclusively in terms of political orientation and struggle. The aim of this paper is to show that the local newspaper Domovina reflected and recorded phenomena and events significant for the daily life of the community with the intention of preservation its identity from the perspective of social history, especially in the section From the town and surrounding areas
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
Slow Magnetic Relaxation at Zero Field in the Tetrahedral Complex [Co(SPh)<sub>4</sub>]<sup>2–</sup>
The Ph<sub>4</sub>P<sup>+</sup> salt of the tetrahedral
complex
[Co(SPh)<sub>4</sub>]<sup>2–</sup>, possessing an <i>S</i> = <sup>3</sup>/<sub>2</sub> ground state with an axial zero-field
splitting of <i>D</i> = −70 cm<sup>–1</sup>, displays single-molecule magnet behavior in the absence of an applied
magnetic field. At very low temperatures, ac magnetic susceptibility
data show the magnetic relaxation time, τ, to be temperature-independent,
while above 2.5 K thermally activated Arrhenius behavior is apparent
with <i>U</i><sub>eff</sub> = 21(1) cm<sup>–1</sup> and τ<sub>0</sub> = 1.0(3) × 10<sup>–7</sup> s.
Under an applied field of 1 kOe, τ more closely approximates
Arrhenius behavior over the entire temperature range. Upon dilution
of the complex within a matrix of the isomorphous compound (Ph<sub>4</sub>P)<sub>2</sub>[Zn(SPh)<sub>4</sub>], ac susceptibility data
reveal the molecular nature of the slow magnetic relaxation and indicate
that the quantum tunneling pathway observed at low temperatures is
likely mediated by intermolecular dipolar interactions
Magnetic Blocking at 10 K and a Dipolar-Mediated Avalanche in Salts of the Bis(η<sup>8</sup>‑cyclooctatetraenide) Complex [Er(COT)<sub>2</sub>]<sup>−</sup>
The structures and magnetic properties
of [K(18-crown-6)]<sup>+</sup> (<b>1</b>) and [K(18-crown-6)(THF)<sub>2</sub>]<sup>+</sup> (<b>2</b>) salts of the η<sup>8</sup>-cyclooctatetraenide
sandwich complex [Er(COT)<sub>2</sub>]<sup>−</sup> (COT<sup>2–</sup> = cyclooctatetraene dianion) are reported. Despite
slight differences in symmetry, both compounds exhibit slow magnetic
relaxation under zero applied dc field with relaxation barriers of
∼150 cm<sup>–1</sup> and waist-restricted magnetic hysteresis.
Dc relaxation and dilution studies suggest that the drop in the magnetic
hysteresis near zero field is influenced by a bulk magnetic avalanche
effect coupled with tunneling of the magnetization. Through dilution
with [K(18-crown-6)(THF)<sub>2</sub>][Y(COT)<sub>2</sub>] (<b>3</b>), these phenomena are substantially quenched, resulting in an open
hysteresis loop to 10 K. Importantly, this represents the highest
blocking temperature yet observed for a mononuclear complex and the
second highest for any single-molecule magnet. A comprehensive comparative
analysis of the magnetism of [K(18-crown-6)][Ln(COT)<sub>2</sub>]
(Ln = Sm, Tb, Dy, Ho, Yb) reveals slow relaxation only for [K(18-crown-6)][Dy(COT)<sub>2</sub>] (<b>4</b>) with weak temperature dependence. Collectively,
these results highlight the utility of an equatorial ligand field
for facilitating slow magnetic relaxation in the prolate Er<sup>III</sup> ion
A Dual−Ion Battery Cathode via Oxidative Insertion of Anions in a Metal–Organic Framework
A redox−active
metal–organic framework, Fe<sub>2</sub>(dobpdc) (dobpdc<sup>4–</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate),
is shown to undergo a topotactic oxidative insertion reaction with
a variety of weakly coordinating anions, including BF<sub>4</sub><sup>–</sup> and PF<sub>6</sub><sup>–</sup>. The reaction
results in just a minor lattice contraction, and a broad intervalence
charge-transfer band emerges, indicative of charge mobility. Although
both metal- and ligand-based oxidations can be accessed, only the
former were found to be fully reversible and, importantly, proceed
stoichiometrically under both chemical and electrochemical conditions.
Electrochemical measurements probing the effects of nanoconfinement
on the insertion reaction revealed strong anion size and solvent dependences.
Significantly, the anion insertion behavior of Fe<sub>2</sub>(dobpdc)
enabled its use in the construction of a dual-ion battery prototype
incorporating a sodium anode. As a cathode, the material displays
a particularly high initial reduction potential and is further stable
for at least 50 charge/discharge cycles, exhibiting a maximum specific
energy of 316 Wh/kg
Correction to “A Dual-Ion Battery Cathode via Oxidative Insertion of Anions in a Metal–Organic Framework”
Correction
to “A Dual-Ion Battery Cathode via
Oxidative Insertion of Anions in a Metal–Organic Framework
- …