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Journal of Porous Materials

Volumn 18, Issue 1, 2011, Pages 57-67

Mesoporous nanocrystalline zirconium oxide: Novel preparation and photoluminescence property

(7) Che, Hongwei a Han, Shuhua a Hou, Wanguo a,b Liu, Aifeng a Wang, Shasha a Sun, Yuanyuan a Cui, Xiaoyan a

a SHANDONG UNIVERSITY (China)

b QINGDAO UNIVERSITY OF SCIENCE AND TECHNOLOGY (China)

Author keywords

Mesoporous; Nanocrystalline zirconia; Photoluminescence; Soft templating

Indexed keywords

BET SURFACE AREA; CALCINATION TEMPERATURE; CO-OPERATIVE ASSEMBLY; EMISSION PEAKS; HIGH SPECIFIC SURFACE AREA; INORGANIC PRECURSOR; MESO-PORES; MESOPOROUS; MESOPOROUS STRUCTURES; MESOSTRUCTURED; NANOCRYSTALLINE ZIRCONIA; NANOCRYSTALLINES; NOVEL STRATEGIES; PHOTOLUMINESCENCE PROPERTIES; PHOTOLUMINESCENCE SPECTRUM; SOLID MAGNESIUM; SOLID-LIQUID; STRUCTURE DIRECTING AGENTS; SULPHATES; TEMPLATING; TEMPLATING METHOD; UV EXCITATION; ZIRCONIA MATERIALS; ZIRCONIUM OXIDE;

BROMINE COMPOUNDS; CALCINATION; MAGNESIUM; MESOPOROUS MATERIALS; NANOCRYSTALLINE POWDERS; PHOTOLUMINESCENCE; ZIRCONIUM; ZIRCONIUM ALLOYS;

ZIRCONIA;

EID: 78650765095 PISSN: 13802224 EISSN: None Source Type: Journal
DOI: 10.1007/s10934-010-9356-6 Document Type: Article

Times cited : (9)

References (45)

1
- 0028447287
- 1:CAS:528:DyaK2cXkvFGlsbc%3D 10.1016/0920-5861(94)80003-0
- T Yamaguchi 1994 Catal. Today 20 199 1:CAS:528:DyaK2cXkvFGlsbc%3D 10.1016/0920-5861(94)80003-0
- (1994) Catal. Today , vol.20 , pp. 199
- Yamaguchi, T.¹

2
- 0034301609
- 10.1002/1521-4095(200010)12:19<1465::AID-ADMA1465>3.0.CO;2-9
- RJ Gorte S Park JM Vohs CH Wang 2000 Adv. Mater. 19 1465 10.1002/1521-4095(200010)12:19<1465::AID-ADMA1465>3.0.CO;2-9
- (2000) Adv. Mater. , vol.19 , pp. 1465
- Gorte, R.J.¹ Park, S.² Vohs, J.M.³ Wang, C.H.⁴

3
- 0033328450
- Electronic conduction in low oxygen partial pressure measurements using an amperometric zirconia oxygen sensor
- DOI 10.1016/S0925-4005(99)00233-6
- KR Sridhar JA Blacnchard 1999 Sens. Actuators B. 59 60 10.1016/S0925-4005(99)00233-6 (Pubitemid 30514422)
- (1999) Sensors and Actuators, B: Chemical , vol.59 , Issue.1 , pp. 60-67
- Sridhar, K.R.¹ Blanchard, J.A.²

4
- 0000461412
- 1:CAS:528:DyaK1MXos12k 10.1021/cm980205v
- U Ciesla M Froba G Stucky F Schüth 1999 Chem. Mater. 11 227 1:CAS:528:DyaK1MXos12k 10.1021/cm980205v
- (1999) Chem. Mater. , vol.11 , pp. 227
- Ciesla, U.¹ Froba, M.² Stucky, G.³ Schüth, F.⁴

5
- 0034692356
- 1:CAS:528:DC%2BD3cXmtV2hs7Y%3D 10.1021/ja0013677
- M Mamak N Coombs G Ozin 2000 J. Am. Chem. Soc. 122 8932 1:CAS:528:DC%2BD3cXmtV2hs7Y%3D 10.1021/ja0013677
- (2000) J. Am. Chem. Soc. , vol.122 , pp. 8932
- Mamak, M.¹ Coombs, N.² Ozin, G.³

6
- 23944488018
- A composite surfactant route for the synthesis of thermally stable and hierarchically porous zirconia with a nanocrystallized framework
- DOI 10.1002/adma.200500221
- HR Chen JL Gu JL Shi ZC Liu JH Gao ML Ruan DS Yan 2005 Adv. Mater. 17 2010 1:CAS:528:DC%2BD2MXpsFGisLc%3D 10.1002/adma.200500221 (Pubitemid 41206159)
- (2005) Advanced Materials , vol.17 , Issue.16 , pp. 2010-2014
- Chen, H.¹ Gu, J.² Shi, J.³ Liu, Z.⁴ Gao, J.⁵ Ruan, M.⁶ Yan, D.⁷

7
- 41749098344
- 2 monoliths with well-defined macropores and mesostructured skeletons prepared by combining the alkoxy-derived sol-gel process accompanied by phase separation and the solvothermal process
- DOI 10.1021/cm703351d
- J Konishi K Fujita S Oiwa K Nakanishi K Hirao 2008 Chem. Mater. 20 2165 1:CAS:528:DC%2BD1cXis1GhtLs%3D 10.1021/cm703351d (Pubitemid 351489864)
- (2008) Chemistry of Materials , vol.20 , Issue.6 , pp. 2165-2173
- Konishi, J.¹ Fujita, K.² Oiwa, S.³ Nakanishi, K.⁴ Hirao, K.⁵

8
- 6444239980
- 1:CAS:528:DC%2BD2cXntFWhtro%3D 10.1021/jp048190d
- XM Liu GQ Liu ZF Yan 2004 J. Phys. Chem. B 108 15523 1:CAS:528: DC%2BD2cXntFWhtro%3D 10.1021/jp048190d
- (2004) J. Phys. Chem. B , vol.108 , pp. 15523
- Liu, X.M.¹ Liu, G.Q.² Yan, Z.F.³

9
- 67649204823
- 1:CAS:528:DC%2BD1MXkvVyktLo%3D 10.1021/jp9014096
- SK Das MK Bhunia AK Sinha A Bhaumik 2009 J. Phys. Chem. C 113 8918 1:CAS:528:DC%2BD1MXkvVyktLo%3D 10.1021/jp9014096
- (2009) J. Phys. Chem. C , vol.113 , pp. 8918
- Das, S.K.¹ Bhunia, M.K.² Sinha, A.K.³ Bhaumik, A.⁴

10
- 33745800468
- Synthesis of thermally stable zirconia-based mesoporous materials via a facile post-treatment
- DOI 10.1021/jp060564a
- SY Chen LY Jiang SF Cheng 2006 J. Phys. Chem. B 110 11761 1:CAS:528:DC%2BD28XltVCgu7g%3D 10.1021/jp060564a (Pubitemid 44024790)
- (2006) Journal of Physical Chemistry B , vol.110 , Issue.24 , pp. 11761-11771
- Chen, S.-Y.¹ Jang, L.-Y.² Cheng, S.³

11
- 33746907409
- 10.1021/ar050091a
- Y Wan HF Yang DY Zhao 2006 Acc. Chem. Res. 7 423 10.1021/ar050091a
- (2006) Acc. Chem. Res. , vol.7 , pp. 423
- Wan, Y.¹ Yang, H.F.² Zhao, D.Y.³

12
- 0000093366
- 1:CAS:528:DyaK1cXkvFKmsr0%3D 10.1021/cm970525z
- MS Wong JY Ying 1998 Chem. Mater. 10 2067 1:CAS:528:DyaK1cXkvFKmsr0%3D 10.1021/cm970525z
- (1998) Chem. Mater. , vol.10 , pp. 2067
- Wong, M.S.¹ Ying, J.Y.²

13
- 11844268820
- 1:CAS:528:DyaK1MXmtF2kur0%3D 10.1021/cm990185c
- PD Yang DY Zhao DI Margolese BF Chmelka GD Stuky 1999 Chem. Mater. 11 2813 1:CAS:528:DyaK1MXmtF2kur0%3D 10.1021/cm990185c
- (1999) Chem. Mater. , vol.11 , pp. 2813
- Yang, P.D.¹ Zhao, D.Y.² Margolese, D.I.³ Chmelka, B.F.⁴ Stuky, G.D.⁵

14
- 0000348497
- 1:CAS:528:DyaK28XjsFanu7k%3D 10.1007/BF00806572
- JS Reddy A Sayari 1996 Catal. Lett. 38 219 1:CAS:528:DyaK28XjsFanu7k%3D 10.1007/BF00806572
- (1996) Catal. Lett. , vol.38 , pp. 219
- Reddy, J.S.¹ Sayari, A.²

15
- 0035954444
- 1:CAS:528:DC%2BD3MXjvFWjsrc%3D 10.1021/la010172p
- YQ Wang LX Yin O Palchik YR Hacohen Y Koltypin A Gedanken 2001 Langmuir 17 4131 1:CAS:528:DC%2BD3MXjvFWjsrc%3D 10.1021/la010172p
- (2001) Langmuir , vol.17 , pp. 4131
- Wang, Y.Q.¹ Yin, L.X.² Palchik, O.³ Hacohen, Y.R.⁴ Koltypin, Y.⁵ Gedanken, A.⁶

16
- 0035217865
- 2O systems: A kinetic study of synthesis mechanism
- DOI 10.1016/S1466-6049(01)00084-8, PII S1466604901000848
- JL Blin R Flamant BL Su 2001 Int. J. Inorg. Mater. 3 959 1:CAS:528:DC%2BD38XptFOn 10.1016/S1466-6049(01)00084-8 (Pubitemid 33150719)
- (2001) International Journal of Inorganic Materials , vol.3 , Issue.7 , pp. 959-972
- Blin, J.L.¹ Flamant, R.² Su, B.L.³

17
- 0042656645
- 1:CAS:528:DC%2BD3sXls1aisbc%3D 10.1016/S1293-2558(03)00127-4
- YW Suh JW Lee HK Rhee 2003 Solid State Sci. 5 995 1:CAS:528: DC%2BD3sXls1aisbc%3D 10.1016/S1293-2558(03)00127-4
- (2003) Solid State Sci. , vol.5 , pp. 995
- Suh, Y.W.¹ Lee, J.W.² Rhee, H.K.³

18
- 33750385844
- 10.1002/anie.199605411
- U Ciesla S Schacht GD Stucky KK Unger F Schüth 1996 Angew. Chem. Int. Ed. Engl. 5 541 10.1002/anie.199605411
- (1996) Angew. Chem. Int. Ed. Engl. , vol.5 , pp. 541
- Ciesla, U.¹ Schacht, S.² Stucky, G.D.³ Unger, K.K.⁴ Schüth, F.⁵

19
- 0034772803
- Non-siliceous mesostructured and mesoporous materials
- DOI 10.1021/cm011030j
- F Schüth 2001 Chem. Mater. 13 3184 10.1021/cm011030j (Pubitemid 32999267)
- (2001) Chemistry of Materials , vol.13 , Issue.10 , pp. 3184-3195
- Schuth, F.¹

20
- 78650766099
- N. Shirokura, K. Nakajima, A. Nakabayashi, D.L. Lu, M. Hara, K. Domen, T. Tatsumi, J.N. Kondo, Chem. Commun. 2188 (2006)
- (2006) Chem. Commun. , vol.2188
- Shirokura, N.¹ Nakajima, K.² Nakabayashi, A.³ Lu, D.L.⁴ Hara, M.⁵ Domen, K.⁶ Tatsumi, T.⁷ Kondo, J.N.⁸

21
- 78650787909
- S.C. Laha, R. Ryoo, Chem. Commun. 2138 (2003)
- (2003) Chem. Commun. , vol.2138
- Laha, S.C.¹ Ryoo, R.²

22
- 33947534863
- 2: Synthesis by nanocasting, characterisation and catalytic properties
- DOI 10.1016/j.micromeso.2006.11.029, PII S1387181106005257
- J Roggenbuck H Schäfer T Tsoncheva C Minchev J Hanss M Tiemann 2007 Microporous Mesoporous Mater. 101 335 1:CAS:528:DC%2BD2sXjvVanuro%3D 10.1016/j.micromeso.2006.11.029 (Pubitemid 46467496)
- (2007) Microporous and Mesoporous Materials , vol.101 , Issue.3 , pp. 335-341
- Roggenbuck, J.¹ Schafer, H.² Tsoncheva, T.³ Minchev, C.⁴ Hanss, J.⁵ Tiemann, M.⁶

23
- 13644265617
- Ordered mesoporous magnesium oxide with high thermal stability synthesized by exotemplating using CMK-3 carbon
- DOI 10.1021/ja043605u
- J Roggenbuck M Tiemann 2005 J. Am. Chem. Soc. 127 1096 1:CAS:528:DC%2BD2MXitlGiug%3D%3D 10.1021/ja043605u (Pubitemid 40228672)
- (2005) Journal of the American Chemical Society , vol.127 , Issue.4 , pp. 1096-1097
- Roggenbuck, J.¹ Tiemann, M.²

24
- 0042281526
- 1:CAS:528:DC%2BD3sXntFyjurc%3D 10.1002/adma.200305211
- BZ Tian XY Liu HF Yang SH Xie CZ Yu B Tu DY Zhao 2003 Adv. Mater. 15 1370 1:CAS:528:DC%2BD3sXntFyjurc%3D 10.1002/adma.200305211
- (2003) Adv. Mater. , vol.15 , pp. 1370
- Tian, B.Z.¹ Liu, X.Y.² Yang, H.F.³ Xie, S.H.⁴ Yu, C.Z.⁵ Tu, B.⁶ Zhao, D.Y.⁷

25
- 33645695156
- 1:CAS:528:DC%2BD28XhtFeit78%3D 10.1039/b513060c
- XS Zhao F Su Q Yan W Guo X Bao L Lv Z Zhou 2006 J. Mater. Chem. 16 637 1:CAS:528:DC%2BD28XhtFeit78%3D 10.1039/b513060c
- (2006) J. Mater. Chem. , vol.16 , pp. 637
- Zhao, X.S.¹ Su, F.² Yan, Q.³ Guo, W.⁴ Bao, X.⁵ Lv, L.⁶ Zhou, Z.⁷

26
- 13144261764
- 4 synthesized by nanocasting from vinyl-functionalized cubic Ia3d mesoporous silica
- DOI 10.1002/adma.200400777
- Y Wang CM Yang W Schmidt B Spliethoff E Bill F Schüth 2005 Adv. Mater. 17 53 1:CAS:528:DC%2BD2MXhtVGht7g%3D 10.1002/adma.200400777 (Pubitemid 40178446)
- (2005) Advanced Materials , vol.17 , Issue.1 , pp. 53-56
- Wang, Y.¹ Yang, C.-M.² Schmidt, W.³ Spliethoff, B.⁴ Bill, E.⁵ Schuth, F.⁶

27
- 33847196134
- 1:CAS:528:DC%2BD2sXjt1Omtw%3D%3D 10.1021/cm0610635
- A Rumplecker F Kleitz E-L Salabas F Schüth 2007 Chem. Mater. 19 485 1:CAS:528:DC%2BD2sXjt1Omtw%3D%3D 10.1021/cm0610635
- (2007) Chem. Mater. , vol.19 , pp. 485
- Rumplecker, A.¹ Kleitz, F.² Salabas, E.-L.³ Schüth, F.⁴

28
- 78650768339
- W.B. Yue, A.H. Hill, A. Harrison, W.Z. Zhou, Chem. Commun. 2518 (2007)
- (2007) Chem. Commun. , vol.2518
- Yue, W.B.¹ Hill, A.H.² Harrison, A.³ Zhou, W.Z.⁴

29
- 36448957258
- Porous crystals of cubic metal oxides templated by cage-containing mesoporous silica
- DOI 10.1039/b709076e
- WB Yue WZ Zhou 2007 J. Mater. Chem. 17 4947 1:CAS:528:DC%2BD2sXhtlGht7bL 10.1039/b709076e (Pubitemid 350175931)
- (2007) Journal of Materials Chemistry , vol.17 , Issue.47 , pp. 4947-4952
- Yue, W.¹ Zhou, W.²

30
- 33846502047
- Ordered mesoporous copper oxide with crystalline walls
- DOI 10.1002/anie.200603210
- X Lai X Li W Geng J Tu J Li S Qiu 2007 Angew. Chem. Int. Ed. 46 738 1:CAS:528:DC%2BD2sXhtleku7k%3D 10.1002/anie.200603210 (Pubitemid 46155402)
- (2007) Angewandte Chemie - International Edition , vol.46 , Issue.5 , pp. 738-741
- Lai, X.¹ Li, X.² Geng, W.³ Tu, J.⁴ Li, J.⁵ Qiu, S.⁶

31
- 4344718403
- 10.1016/j.cattod.2004.06.063
- M Kang D Kim SH Yi JU Han JE Yie JM Kim 2004 Catal. Today 93-95 695 10.1016/j.cattod.2004.06.063
- (2004) Catal. Today , vol.9395 , pp. 695
- Kang, M.¹ Kim, D.² Yi, S.H.³ Han, J.U.⁴ Yie, J.E.⁵ Kim, J.M.⁶

32
- 55049112230
- 1:CAS:528:DC%2BD1cXht12rsLrJ 10.1039/b807620k
- B Liu RT Baker 2008 J. Mater. Chem. 18 5200 1:CAS:528:DC%2BD1cXht12rsLrJ 10.1039/b807620k
- (2008) J. Mater. Chem. , vol.18 , pp. 5200
- Liu, B.¹ Baker, R.T.²

33
- 0346686081
- 1:CAS:528:DC%2BD2cXls1Om 10.1038/nmat1043
- D Li HS Zhou I Honma 2004 Nat. Mater. 3 65 1:CAS:528:DC%2BD2cXls1Om 10.1038/nmat1043
- (2004) Nat. Mater. , vol.3 , pp. 65
- Li, D.¹ Zhou, H.S.² Honma, I.³

34
- 0033609997
- Inhibition of crystallite growth in the sol-gel synthesis of nanocrystalline metal oxides
- DOI 10.1126/science.285.5432.1375
- N-L Wu S-Y Wang IA Rusakova 1999 Science 27 1375 10.1126/science.285. 5432.1375 (Pubitemid 29411663)
- (1999) Science , vol.285 , Issue.5432 , pp. 1375-1377
- Wu, N.-L.¹ Wang, S.-Y.² Rusakova, I.A.³

35
- 39849107107
- Crystallization of mesoporous metal oxides
- DOI 10.1021/cm702176m
- JN Kondo K Domen 2008 Chem. Mater. 20 835 1:CAS:528: DC%2BD1cXhtlyisg%3D%3D 10.1021/cm702176m (Pubitemid 351315682)
- (2008) Chemistry of Materials , vol.20 , Issue.3 , pp. 835-847
- Kondo, J.N.¹ Domen, K.²

36
- 52649118177
- 1:CAS:528:DC%2BD1cXpslahsbg%3D 10.1021/jp804250f
- DH Wang Z Ma S Dai J Liu ZM Nie MH Engelhard QS Huo CM Wang R Kou 2008 J. Phys. Chem. C 112 13499 1:CAS:528:DC%2BD1cXpslahsbg%3D 10.1021/jp804250f
- (2008) J. Phys. Chem. C , vol.112 , pp. 13499
- Wang, D.H.¹ Ma, Z.² Dai, S.³ Liu, J.⁴ Nie, Z.M.⁵ Engelhard, M.H.⁶ Huo, Q.S.⁷ Wang, C.M.⁸ Kou, R.⁹

37
- 0038005517
- Crystallization of an ordered mesoporous Nb-Ta oxide
- DOI 10.1002/anie.200250263
- T Katou B Lee D Lu JN Kondo M Hara K Domen 2003 Angew. Chem. Int. Ed. 42 2382 1:CAS:528:DC%2BD3sXkslektbg%3D 10.1002/anie.200250263 (Pubitemid 36735547)
- (2003) Angewandte Chemie - International Edition , vol.42 , Issue.21 , pp. 2382-2385
- Katou, T.¹ Lee, B.² Lu, D.³ Kondo, J.N.⁴ Hara, M.⁵ Domen, K.⁶

38
- 39749102776
- Direct access to thermally stable and highly crystalline mesoporous transition-metal oxides with uniform pores
- DOI 10.1038/nmat2111, PII NMAT2111
- J Lee MC Orilall SC Warren M Kamperman FJ Disalvo U Wiesner 2008 Nat. Mater. 7 222 1:CAS:528:DC%2BD1cXisVSrs7Y%3D 10.1038/nmat2111 (Pubitemid 351311298)
- (2008) Nature Materials , vol.7 , Issue.3 , pp. 222-228
- Lee, J.¹ Christopher Orilall, M.² Warren, S.C.³ Kamperman, M.⁴ Disalvo, F.J.⁵ Wiesner, U.⁶

39
- 0034583236
- 1:CAS:528:DC%2BD3MXisVCgtb4%3D 10.1351/pac200072122275
- KR Seddon A Stark M Torres 2000 Pure Appl. Chem. 72 2275 1:CAS:528:DC%2BD3MXisVCgtb4%3D 10.1351/pac200072122275
- (2000) Pure Appl. Chem. , vol.72 , pp. 2275
- Seddon, K.R.¹ Stark, A.² Torres, M.³

40
- 2742540878
- 1:CAS:528:DyaK28Xmt1GntL0%3D 10.1021/jp9620835
- R Ryoo JM Kim CH Ko CH Shin 1996 J. Phys. Chem. 100 17718 1:CAS:528:DyaK28Xmt1GntL0%3D 10.1021/jp9620835
- (1996) J. Phys. Chem. , vol.100 , pp. 17718
- Ryoo, R.¹ Kim, J.M.² Ko, C.H.³ Shin, C.H.⁴

41
- 33749534861
- 3 with crystalline walls using post-template reduction/oxidation
- DOI 10.1021/ja063662i
- F Jiao J-C Jumas M Womes AV Chadwick A Harrison PG Bruce 2006 J. Am. Chem. Soc. 128 12905 1:CAS:528:DC%2BD28XptlOltbw%3D 10.1021/ja063662i (Pubitemid 44527768)
- (2006) Journal of the American Chemical Society , vol.128 , Issue.39 , pp. 12905-12909
- Jiao, F.¹ Jumas, J.-C.² Womes, M.³ Chadwick, A.V.⁴ Harrison, A.⁵ Bruce, P.G.⁶

42
- 78650774862
- HQ Cao XQ Qiu B Luo Y Liang YH Zhang RQ Tan MJ Zhao QM Zhu 2004 Adv. Funct. Mater. 3 14 243
- (2004) Adv. Funct. Mater. , vol.3 , pp. 14-243
- Cao, H.Q.¹ Qiu, X.Q.² Luo, B.³ Liang, Y.⁴ Zhang, Y.H.⁵ Tan, R.Q.⁶ Zhao, M.J.⁷ Zhu, Q.M.⁸

43
- 0000455804
- 1:CAS:528:DyaK2MXksl2jur4%3D 10.1006/jcat.1995.1088
- F Babou G Coudurier JC Vedrine 1995 J. Catal. 152 341 1:CAS:528:DyaK2MXksl2jur4%3D 10.1006/jcat.1995.1088
- (1995) J. Catal. , vol.152 , pp. 341
- Babou, F.¹ Coudurier, G.² Vedrine, J.C.³

44
- 33645085884
- 1:CAS:528:DC%2BD28XivVOhu7Y%3D 10.1016/j.micromeso.2005.12.006
- AV Ivanov SV Lysenko SV Baranova AV Sungurov TN Zangelov EA Karakhanov 2006 Microporous Mesoporous Mater. 91 254 1:CAS:528:DC%2BD28XivVOhu7Y%3D 10.1016/j.micromeso.2005.12.006
- (2006) Microporous Mesoporous Mater. , vol.91 , pp. 254
- Ivanov, A.V.¹ Lysenko, S.V.² Baranova, S.V.³ Sungurov, A.V.⁴ Zangelov, T.N.⁵ Karakhanov, E.A.⁶

45
- 34247106260
- Evolved gas analyses (TG/DTA-MS and TG-FTIR) on dehydration and pyrolysis of magnesium nitrate hexahydrate in air and nitrogen
- DOI 10.1016/j.jaap.2006.12.024, PII S0165237006001975
- J Madarász PP Varga G Pokol 2007 J. Anal. Appl. Pyrolysis 79 475 10.1016/j.jaap.2006.12.024 (Pubitemid 46589634)
- (2007) Journal of Analytical and Applied Pyrolysis , vol.79 , Issue.1-2 SPEC. ISS. , pp. 475-478
- Madarasz, J.¹ Varga, P.P.² Pokol, G.³

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