Spin-canting and weak ferromagnetism in two novel 1D alternating chains with single cis-end-to-end azido bridges

Two new compounds of general formula [M(N3)2(dmbpy)] in which dmbpy = 5,5′-dimethyl-2,2′-bipyridine, and M = Mn(II) or Co(II), have been solvothermally synthesized and characterized structurally and magnetically. The structures consist of zig-zag polymeric chains with alternating bis-µ(azide-N1)2M and bis-µ(azide-N1,N3)2M units in which the cis-octahedrally based coordination geometry is completed by the N,N’-chelating ligand dmbpy. The molecular structures are basically the same for each metal. The Mn(II) compound has a slightly different packing mode compared to the Co(II) compound, resulting from their different space groups. Interestingly, relatively weak interchain interactions are present in both compounds and this originates from π–π stacking between the dmbpy rings. The magnetic properties of both compounds have been investigated down to 2 K. The measurements indicate that the manganese compound shows spin-canted antiferromagnetic ordering with a Néel temperature of TN = 3.4 K and further, a field-induced magnetic transition of metamagnetism at temperatures below the TN. This finding affords the first example of an 1D Mn(II) compound with alternating double end-on (EO) and double end-to-end (EE) azido-bridged ligands, showing the coexistence of spin canting and metamagnetism. The cobalt compound shows a weak ferromagnetism resulting from a spin-canted antiferromagnetism and long-range magnetic ordering with a critical temperature, TC = 16.2 K.

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Weak Ferromagnetism and Dynamic Magnetic Behavior in a Single End-to-End Azide-Bridged Nickel(II) Chain

Advanced Materials ◽

10.1002/adma.200600253 ◽

2006 ◽

Vol 18 (21) ◽

pp. 2852-2856 ◽

Cited By ~ 73

Author(s):

X.-T. Liu ◽

X.-Y. Wang ◽

W.-X. Zhang ◽

P. Cui ◽

S. Gao

Keyword(s):

Magnetic Behavior ◽

Weak Ferromagnetism ◽

End To End

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Coexistence of Spin Canting and Metamagnetism in a One-Dimensional Mn(III) Complex Bridged by a Single End-to-End Azide

Inorganic Chemistry ◽

10.1021/ic061415+ ◽

2006 ◽

Vol 45 (22) ◽

pp. 8847-8849 ◽

Cited By ~ 76

Author(s):

Hyun Hee Ko ◽

Jeong Hak Lim ◽

Hyoung Chan Kim ◽

Chang Seop Hong

Keyword(s):

Spin Canting ◽

One Dimensional ◽

End To End

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Spin-canting in a 1D chain Mn(II) complex with alternating double end-on and double end-to-end azido bridging ligands

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2007.04.004 ◽

2007 ◽

Vol 10 (8) ◽

pp. 897-901 ◽

Cited By ~ 17

Author(s):

Jian-Ying Zhang ◽

Cai-Ming Liu ◽

De-Qing Zhang ◽

Song Gao ◽

Dao-Ben Zhu

Keyword(s):

Bridging Ligands ◽

Spin Canting ◽

1D Chain ◽

End To End

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Spin Canting and Metamagnetism in 2D and 3D Cobalt(II) Coordination Networks with Alternating Double End-On and Double End-to-End Azido Bridges

Inorganic Chemistry ◽

10.1021/ic201035c ◽

2011 ◽

Vol 50 (15) ◽

pp. 7324-7333 ◽

Cited By ~ 57

Author(s):

Jaursup Boonmak ◽

Motohiro Nakano ◽

Narongsak Chaichit ◽

Chaveng Pakawatchai ◽

Sujittra Youngme

Keyword(s):

Coordination Networks ◽

Spin Canting ◽

End To End ◽

2D And 3D

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Weak ferromagnetism derived from spin canting in an amido-bridged homochiral Mn(iii) 1-D coordination polymer

Dalton Transactions ◽

10.1039/c9dt00593e ◽

2019 ◽

Vol 48 (24) ◽

pp. 8617-8622

Author(s):

Sotaro Kusumoto ◽

Atsushi Koga ◽

Fumiya Kobayashi ◽

Ryo Ohtani ◽

Yang Kim ◽

...

Keyword(s):

Coordination Polymer ◽

Coercive Field ◽

Weak Ferromagnetism ◽

Spin Canting ◽

One Dimensional ◽

Weak Ferromagnet

An amido-bridged homochiral one-dimensional (1D) Mn(iii) coordination polymer behaves as a weak ferromagnet arising from spin canting with a coercive field of 3.0 kOe.

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Surgical management of extracranial carotid artery aneurysms

VASA ◽

10.1024/0301-1526/a000528 ◽

2016 ◽

Vol 45 (3) ◽

pp. 223-228 ◽

Cited By ~ 2

Author(s):

Jan Paweł Skóra ◽

Jacek Kurcz ◽

Krzysztof Korta ◽

Przemysław Szyber ◽

Tadeusz Andrzej Dorobisz ◽

...

Keyword(s):

Carotid Artery ◽

Surgical Management ◽

Minor Stroke ◽

Stroke Rate ◽

Extracranial Carotid Artery ◽

Long Term Follow Up ◽

End To End ◽

Dacron Patch ◽

Major Stroke

Abstract. Background: We present the methods and results of the surgical management of extracranial carotid artery aneurysms (ECCA). Postoperative complications including early and late neurological events were analysed. Correlation between reconstruction techniques and morphology of ECCA was assessed in this retrospective study. Patients and methods: In total, 32 reconstructions of ECCA were performed in 31 symptomatic patients with a mean age of 59.2 (range 33 - 84) years. The causes of ECCA were divided among atherosclerosis (n = 25; 78.1 %), previous carotid endarterectomy with Dacron patch (n = 4; 12.5 %), iatrogenic injury (n = 2; 6.3 %) and infection (n = 1; 3.1 %). In 23 cases, intervention consisted of carotid bypass. Aneurysmectomy with end-to-end suture was performed in 4 cases. Aneurysmal resection with patching was done in 2 cases and aneurysmorrhaphy without patching in another 2 cases. In 1 case, ligature of the internal carotid artery (ICA) was required. Results: Technical success defined as the preservation of ICA patency was achieved in 31 cases (96.9 %). There was one perioperative death due to major stroke (3.1 %). Two cases of minor stroke occurred in the 30-day observation period (6.3 %). Three patients had a transient hypoglossal nerve palsy that subsided spontaneously (9.4 %). At a mean long-term follow-up of 68 months, there were no major or minor ipsilateral strokes or surgery-related deaths reported. In all 30 surviving patients (96.9 %), long-term clinical outcomes were free from ipsilateral neurological symptoms. Conclusions: Open surgery is a relatively safe method in the therapy of ECCA. Surgical repair of ECCAs can be associated with an acceptable major stroke rate and moderate minor stroke rate. Complication-free long-term outcomes can be achieved in as many as 96.9 % of patients. Aneurysmectomy with end-to-end anastomosis or bypass surgery can be implemented during open repair of ECCA.

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WEAK FERROMAGNETISM IN SINGLE CRYSTALS OF KMnF4.H2O AND (NH4) MnF4.2H2O

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19888368 ◽

1988 ◽

Vol 49 (C8) ◽

pp. C8-819-C8-820 ◽

Cited By ~ 2

Author(s):

F. Palacio ◽

M. Andrés ◽

D. van Noort ◽

A. J. van Duyneveldt

Keyword(s):

Single Crystals ◽

Weak Ferromagnetism

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Reliability of the Mangled Extremity Severity Score in the Management of Peripheral Vascular Injuries in Children: A Retrospective Review

International Journal of Angiology ◽

10.1055/s-0040-1720970 ◽

2020 ◽

Author(s):

Ahmed Mousa ◽

Ossama M. Zakaria ◽

Mai A. Elkalla ◽

Lotfy A. Abdelsattar ◽

Hamad Al-Game'a

Keyword(s):

Severity Score ◽

Vein Graft ◽

Bypass Surgery ◽

Age Groups ◽

Vascular Injuries ◽

Peripheral Vascular ◽

Group Iii ◽

Mangled Extremity ◽

Group I ◽

End To End

AbstractThis study was aimed to evaluate different management modalities for peripheral vascular trauma in children, with the aid of the Mangled Extremity Severity Score (MESS). A single-center retrospective analysis took place between 2010 and 2017 at University Hospitals, having emergencies and critical care centers. Different types of vascular repair were adopted by skillful vascular experts and highly trained pediatric surgeons. Patients were divided into three different age groups. Group I included those children between 5 and 10 years; group II involved pediatrics between 11 and 15 years; while children between 16 and 21 years participated in group III. We recruited 183 children with peripheral vascular injuries. They were 87% males and 13% females, with the mean age of 14.72 ± 04. Arteriorrhaphy was performed in 32%; end-to-end anastomosis and natural vein graft were adopted in 40.5 and 49%, respectively. On the other hand, 10.5% underwent bypass surgery. The age groups I and II are highly susceptible to penetrating trauma (p = 0.001), while patients with an extreme age (i.e., group III) are more susceptible to blunt injury (p = 0.001). The MESS has a significant correlation to both age groups I and II (p = 0.001). Vein patch angioplasty and end-to-end primary repair should be adopted as the main treatment options for the repair of extremity vascular injuries in children. Moreover, other treatment modalities, such as repair with autologous vein graft/bypass surgery, may be adopted whenever possible. They are cost-effective, reliable, and simple techniques with fewer postoperative complication, especially in poor/limited resources.

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