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Out-of-favour Dons striker Christian Ramirez appeared to delete his Twitter account after expressing frustration over his situation after manager Jim Goodwin ruled out any move to Hearts following interest from the Capital club in the American striker.

The Jambos instead signed 24-year-old Wigan striker Stephen Humphrys on a season-long loan deal while their search for a defender will continue in the free-agent market.

Goodwin, who ruled out a move for Burton striker Louis Moult, had made enquiries about two players in mid-August. "But if those two particular players don't become available, then there isn't really anything else out there at the moment that either excites us or improves us," he said.

Hearts were interested in taking Christian Ramirez from Aberdeen. Picture: Craig Foy / SNS

David Bates was the subject of the first transfer involving a cinch Premiership club on a slow start to deadline day in Scotland's top flight.

The former Rangers player's permanent move to Belgian side Mechelen from Aberdeen was announced in the early evening. The 25-year-old made 35 appearances for the Dons after arriving from Hamburg just over a year ago.

Another player leaving Pittodrie is 22-year-old winger Connor McLennan, who has joined St Johnstone on a season-long loan.

Celtic completed their ninth summer signing on the final day of the window with the capture of Denmark midfielder Oliver Abildgaard.

The powerful 26-year-old has signed on a season-long loan and been reunited with former Rubin Kazan team-mates Carl Starfelt and Sead Haksabanovic, who made an impressive late debut in Wednesday's 4-1 win over Ross County.

Celtic also loaned out Mikey Johnston – who was a Hearts target – and Liam Shaw but there was no sign of a move for fellow fringe player James McCarrthy.

Winger Johnston has joined Portuguese side Vitoria Guimaraes for the season and also signed a one-year extension to his Celtic contract, which now runs until 2026. Former Sheffield Wednesday midfielder Shaw moved to Morecambe for the campaign.

It was a quiet final day of the window at Ibrox after Rangers manager Giovanni van Bronckhorst stated earlier in the week that he was "relaxed" about his squad.

Nice appeared to be closing in on a deal for Glen Kamara after creating a template for his player profile on their website but the trail went cold. Reports in Belgium claimed Rangers had lined up Standard Liege midfielder Nicolas Raskin as a potential replacement. Ibrox midfielder Stephen Kelly was expected to depart for Livingston before the deadline.

Finland international defender Juhani Ojala left Motherwell by mutual consent after failing to get a first-team game this season while another centre-back, 21-year-old David Devine, was loaned to Alloa. Goalkeeper Scott Fox went to Queen of the South in a temporary deal.

Hibs made a late flurry of signings, all announced after midnight. Season-long loan deals for Manchester United centre-back Will Fish and 6ft 4in Ukrainian international striker Mykola Kukharevych from French Ligue 1 side ES Troyes AC were followed by a deal to buy Swindon forward Harry McKirdy. They earlier loaned Dylan Tait to Arbroath.

Kilmarnock manager Derek McInnes is happy with his squad after signing Christian Doidge on loan from Hibs while Dundee United, St Mirren and Ross County are unlikely to add to their squads.

Meanwhile, Scotland defender Jack Hendry secured a loan move to Serie A side Cremonese from Club Brugge.

Scottish Premiership deadline day transfer news: Aberdeen striker Christian Ramirez not happy